fix: Gif parsing did not work with certain formats

[eonarheim]

===:clipboard: PR Checklist :clipboard:===

• [x] :pushpin: issue exists in github for these changes
• [x] :microscope: existing tests still pass
• [x] :see_no_evil: code conforms to the style guide
• [x] :triangular_ruler: new tests written and passing / old tests updated with new scenario(s)
• [x] :page_facing_up: changelog entry added (or not needed)

==================

Closes #3172

This PR fixes GIF parsing for certain gif formats. Leverages the documentation provided by GIFLib https://giflib.sourceforge.net/whatsinagif/index.html

Changes:

• Tweak the image generation algorithm to be more efficient
• Support Local Color Table in image generation
• Support Disposal Method to allow frame to frame persistence

[cloudflare-workers-and-pages[bot]]

Deploying excaliburjs with    Cloudflare Pages

Latest commit:	aeffede
Status:	✅  Deploy successful!
Preview URL:	https://4f4a5c8e.excaliburjs.pages.dev
Branch Preview URL:	https://fix-gif-parsing.excaliburjs.pages.dev

View logs