Allow images to be the inputs, NOT just PDFs [convert images to searchable pdfs]

[ElectricRCAircraftGuy]

Add these features:

# allow using images as input
pdf2searchablepdf in.jpg in2.jpeg in3.png in4.tif in5.tiff

# alias it as `img2searchablepdf` too:
# (same as above)
img2searchablepdf in.jpg in2.jpeg in3.png in4.tif in5.tiff

# etc

Allow passing in 1 or more image files to be converted into a PDF! Support ALL image types that tesseract supports, such as:

.jpg
.jpeg
.png
.tif
.tiff
.gif
.bmp

etc.

Sloppy work-around

Meanwhile, you can convert images to PDF with img2pdf, like this. See: https://stackoverflow.com/a/8955457/4561887

# 1. convert images to PDF
img2pdf img1.png img2.jpg -o out.pdf

# 2. then convert that PDF to a searchable PDF
pdf2searchablepdf out.pdf

Or, just use tesseract directly, since it takes images as inputs.

OR, a hacky work-around that works right now in pdf2searchablepdf version 0.5.0:

mkdir -p temp \
    && cp "img.jpg" temp \
    && pdf2searchablepdf temp \
    && mv "temp_searchable.pdf" "img.pdf"
# then manually delete the "temp" dir when done