Interstellar major update: new markdown editor, additional markdown syntax (e.g. spoilers), new subscription/star drawer, feed filters, and more

Features

• Mark NSFW and OC posts with badges.
• Add a navigation drawer that displays starred users & magazines along with the selected account's subscriptions/follows.
• New markdown editor with a preview/edit toggle, many formatting buttons, keyboard shortcuts, and auto incrementing lists (on enter).
• Add subscript, superscript, and Lemmy spoiler markdown support.
• Add Lemmy specific sorting options.
• Display the blurhash of post images and user/magazine avatars.
• Make images in markdown clickable (for full screen).
• Adds support for editing and deleting Lemmy posts.
• New feed filter settings to hide posts that match any given pattern.
• Add a compact preview mode that limits thread titles to one line and hides the body preview.

Fixes

• Sync notification indicators and recheck every minute while the app is open.
• Add search debounce to explore pages to fix lagging results.

Other

• Remove iOS, macOS, and web platform files and build actions.
• Remove kbin support and all references in code. Additionally, the Interstellar icon was remade without the kbin icon section.