chore: prepare release 1.17.0

[sable-actions]

Important

Merging this PR will create a new release.

Features

• Add support for misskey-flavored markdown color definitions. E.g. $[fg.color=f00 bg.color=00ff00 red on green]. (#860 by @7w1)
• Add per Space setting for when to show room icons in sidebar (#851 by @nushea)
• Add toggle to list all rooms inside of the home sidebar. (#866 by @nushea)

Change Image Viewer to feel more natural to use. (#686 by @7w1, @nushea, @Septicity)

• Fixed zoom gestures generally not working on mobile.
• Changed the % number in the top right to reflect the zoom of the original image as opposed to the change from it fitting the container.
• Made the zoom pill allow entering custom values.
• Added a button that zooms you to the original size of the image, and a button to return to the size that fills the container.
• Added a pixelated image scaling setting: choose Both, Chat, Image viewer (default), or Neither for crisp nearest-neighbor rendering.
• Transitions are now disabled for manual panning to improve responsiveness.

Fixes

• Fixed starting lists at arbitrary numbers and list markers extending off screen with long numbers. (#860 by @7w1)
• Fix single new lines after block quotes being block-quoted. (#860 by @7w1)
• Fix emojis not rendering in reply chips. (#860 by @7w1)
• Hardened html parsing in standard input box, should no longer randomly delete text in arrow brackets (unless valid, properly closed, legal html). (#860 by @7w1)
• Fixed the message loading spinner flickering instead of continuing during large pagination chunks. (#895 by @7w1)
• Fix matrix.to links getting arrow brackets inserted when editing messages. (#860 by @7w1)
• Fix mentions breaking after editing messages with mentions. (#860 by @7w1)
• Fix account switching and logging in with multiple (SSO) accounts silently failing (#882 by @770grappenmaker)
• Removed the arbitrary bio limit from the bio editor. (#863 by @7w1)
• Remove target and rel attributes from outgoing html links. (#891 by @7w1)
• Fix tablet layouts having the sidebar fill up the screen. (#864 by @7w1)
• Add support for stable mutual rooms endpoint, manually ported from this commit by ajbura upstream. (#852 by @7w1)

Documentation

• Docker build tags have been updated: latest now tracks the latest versioned release and dev now tracks the dev branch. (#892 by @7w1)

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