feat: Add lsd completions. (#1242)

Add [lsd](https://github.com/lsd-rs/lsd) completions for nushell.

Author: neko-side

custom-completions/lsd/README.md

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+# lsd completions
+
+Completions for [lsd](https://github.com/lsd-rs/lsd).
+
+LSD (LSDeluxe) is a cross-platform rewrite of GNU ls, built in Rust with lots of added features like colors, icons, tree-view, more formatting options etc.

custom-completions/lsd/lsd-completions.nu

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+# From original "lsd --help"
+
+def "nu-complete lsd color" [] {
+    ["always", "auto", "never"]
+}
+
+def "nu-complete lsd icon" [] {
+    ["always", "auto", "never"]
+}
+
+def "nu-complete lsd icon-theme" [] {
+    ["fancy", "unicode"]
+}
+
+def "nu-complete lsd permission" [] {
+    ["rwx", "octal", "attributes", "disable"]
+}
+
+def "nu-complete lsd size" [] {
+    ["default", "short", "bytes"]
+}
+
+def "nu-complete lsd date" [] {
+    [date, locale, relative, +date-time-format]
+}
+
+def "nu-complete lsd sort" [] {
+    ["size", "time", "version", "extension", "git", "none"]
+}
+
+def "nu-complete lsd group-dirs" [] {
+    ["none", "first", "last"]
+}
+
+def "nu-complete lsd blocks" [] {
+     ["permission", "user", "group", "context", "size", "date", "name", "inode", "links", "git"]
+}
+
+def "nu-complete lsd hyperlink" [] {
+    ["always", "auto", "never"]
+}
+
+# An ls command with a lot of pretty colors and some other stuff.
+export extern lsd [
+    --all(-a)                                           # Do not ignore entries starting with .
+    --almost-all(-A)                                    # Do not list implied . and ..
+    --color: string@"nu-complete lsd color"             # When to use terminal colours [default: auto]
+    --icon: string@"nu-complete lsd icon"               # When to print the icons [default: auto]
+    --icon-theme: string@"nu-complete lsd icon-theme"   # Whether to use fancy or unicode icons [default: fancy]
+    --classify(-F)                                      # Append indicator (one of */=>@|) at the end of the file names
+    --long(-l)                                          # Display extended file metadata as a table
+    --ignore-config                                     # Ignore the configuration file
+    --config-file: path                                 # Provide a custom lsd configuration file
+    --oneline(-1)                                       # Display one entry per line
+    --recursive(-R)                                     # Recurse into directories
+    --human-readable(-h)                                # For ls compatibility purposes ONLY, currently set by default
+    --tree                                              # Recurse into directories and present the result as a tree
+    --depth: number                                     # Stop recursing into directories after reaching specified depth
+    --directory-only(-d)                                # Display directories themselves, and not their contents (recursively when used with --tree)
+    --permission: string@"nu-complete lsd permission"   # How to display permissions [default: rwx for linux, attributes for windows]
+    --size: string@"nu-complete lsd size"               # How to display size [default: default]
+    --total-size                                        # Display the total size of directories
+    --date: string@"nu-complete lsd date"               # How to display date [default: date]
+    --timesort(-t)                                      # Sort by time modified
+    --sizesort(-S)                                      # Sort by size
+    --extensionsort(-X)                                 # Sort by file extension
+    --gitsort(-G)                                       # Sort by git status
+    --versionsort(-v)                                   # Natural sort of (version) numbers within text
+    --sort: string@"nu-complete lsd sort"               # Sort by TYPE instead of name
+    --no-sort(-U)                                       # Do not sort. List entries in directory order
+    --reverse(-r)                                       # Reverse the order of the sort
+    --group-dirs: string@"nu-complete lsd group-dirs"   # Sort the directories then the files
+    --group-directories-first                           # Groups the directories at the top before the files. Same as --group-dirs=first
+    --blocks: string@"nu-complete lsd blocks"           # Specify the blocks that will be displayed and in what order
+    --classic                                           # Enable classic mode (display output similar to ls)
+    --no-symlink                                        # Do not display symlink target
+    --ignore-glob(-I)                                   # Do not display files/directories with names matching the glob pattern(s). More than one can be specified by repeating the argument
+    --inode(-i)                                         # Display the index number of each file
+    --git(-g)                                           # Show git status on file and directory" Only when used with --long option
+    --dereference(-L)                                   # When showing file information for a symbolic link, show information for the file the link references rather than for the link itself
+    --context(-Z)                                       # Print security context (label) of each file
+    --hyperlink: string@"nu-complete lsd hyperlink"     # Attach hyperlink to filenames [default: never]
+    --header                                            # Display block headers
+    --truncate-owner-after: number                      # Truncate the user and group names if they exceed a certain number of characters
+    --truncate-owner-marker: string                     # Truncation marker appended to a truncated user or group name
+    --system-protected                                  # Includes files with the windows system protection flag set. This is the same as --all on other platforms
+    --literal(-N)                                       # Print entry names without quoting
+    --help                                              # Print help information
+    --version(-V)                                       # Print version
+]