fix: recognise quoted bare names in lakefile.lean require blocks

  `leanRequirePrefixes` only generated the unquoted pattern `require foo`
  for bare dependency names, so lakefiles using the valid quoted form
  `require "foo" from git ...` were rejected with "does not contain a
  require block named 'foo'".

  Add the quoted variant `require "foo"` as a second candidate prefix.
  Add a test fixture and three test cases covering readLeanGitUrl,
  readLeanPinnedRev, and rewriteLeanContents for quoted bare names.

Author: marcelolynch

Hopscotch/LakefileProcessor.lean

@@ -225,8 +225,8 @@ private def leanRequirePrefixes (depName : String) : Array String :=
        , "require \"" ++ scope ++ "\"/\"" ++ name ++ "\""
        ]
   | _ =>
-      -- Bare name: `require depName`.
-      #["require " ++ depName]
+      -- Bare name: `require depName` or `require "depName"` (quoted form is also valid Lake DSL).
+      #["require " ++ depName, "require \"" ++ depName ++ "\""]
 
 /--
 Scan `lines` and collect every `require` block whose dependency name equals `depName`.