Use our existing color palette to map to the 16 basic ansi colors. This
is backwards-compatible because it aliases the existing color names.
Side note: I think the colors in `console.css` for console file
rendering are incomplete, but fixing those is out of scope here imo.
Before and after:
<img width="542" alt="Screenshot 2023-06-28 at 00 26 12"
src="86d41884-bc47-4e85-8aec-621eb7320f0b">
<img width="546" alt="Screenshot 2023-06-28 at 00 28 24"
src="39fa3b37-d49e-49b1-b6bc-390ac8ca24b2">
---------
Co-authored-by: Giteabot <teabot@gitea.io>
Use [PDFObject](https://pdfobject.com/) to embed PDFs, replacing our
outdated PDF.js copy we vendor (the last non-webpack vendoring).
[Commit
1](673e0263da)
is the PDFObject integration
[Commit
2](9336f5769d)
is the removal of PDF.js
<img width="1251" alt="Screenshot 2023-05-27 at 09 57 52"
src="169ce50c-bd1d-4bb0-86e5-1710bd0400a9">
<img width="1257" alt="Screenshot 2023-05-27 at 10 12 50"
src="318f7ee9-fb11-4093-83e7-17475aa70629">
Fallback for unsupporting browsers (most mobile ones, except Firefox
Mobile):
<img width="358" alt="Screenshot 2023-05-27 at 09 43 34"
src="8c12d7ba-57d6-4228-89a0-5fef9fad0cbb">
---------
Co-authored-by: Giteabot <teabot@gitea.io>
