Add support for displaying gzipped lottie (e.g. tgs)

[mohsenasm]

Description

Hi,
This PR adds support for displaying gzipped Lottie files, such as .tgs (Telegram sticker) files.

Demo video:

How it works

Gzipped files begin with a fixed byte sequence (1f 8b), which distinguishes them from standard image formats (PNG, WebP, JPG). The implementation detects this signature in the file header and automatically decompresses gzipped content before parsing it as Lottie JSON. If parsing succeeds, the decompressed animation is passed to the Lottie player.

To test this feature, download and unzip AnimatedSticker.tgs.zip, then send it as m.image or m.sticker.

What I have tested

• Works as m.image, m.sticker, and inline emoji on Chrome
• Works as m.image and m.sticker on Safari
• Functions correctly in sticker and emoji picker on both browsers

Next steps

• Fix inline Lottie emoji width on Safari
• Respect autoplayStickers setting when rendering stickers (set autoplay={false} in DotLottieReact)
• Respect autoplayEmojis setting when rendering emojis (set autoplay={false} in DotLottieReact)

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Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

AI disclosure:

• Partially AI assisted (clarify which code was AI assisted and briefly explain what it does).
• Fully AI generated (explain what all the generated code does in moderate detail).