Keep map PDFs vectorized

[kylecorry31]

• [x] Create a PDF image decoder
• [x] Create a PDF image region decoder
• [x] Switch decoders when a PDF is loaded
• [x] Copy over PDF files, but if the user crops it convert it to an image
• [x] Add a message that cropping will reduce resolution
• [x] Reducing resolution deletes PDF and uses the webp
• [x] Use webp thumbnail
• [x] Split the auto reduce resolution setting into images and pdf
• [ ] Look into reusing PDF renderer / loading in parallel
• [ ] Test on low memory device
• [x] Use source PDF for printing
• [x] Use source PDF for export (only if it is geospatial)
• [ ] Move updated PDF renderer to andromeda

#1345 will replace this once implemented.