docs(advanced-usage/themes): add "unmaintained" section

[SunsetTechuila]

Summary by CodeRabbit

• Documentation
  • Expanded theming guide with many additional theme sources and clearer grouping for easier browsing.
  • Added a “Discover more themes on GitHub” link to simplify finding community themes.
  • Introduced an “Unmaintained themes” section to flag deprecated or unsupported options.
  • Reordered and pruned entries to improve accuracy, discoverability, and maintenance guidance.

[SunsetTechuila]

also removed the "unmaintained" label from the DribbblishDynamic theme and marked Bloom as unmaintained

[coderabbitai]

Walkthrough

Documentation updated: the theming list in docs/advanced-usage/themes.md was expanded with many new theme entries, reordered, a new "Unmaintained themes" section was added, a "Discover more themes on GitHub" link introduced, and at least one prior entry removed.

Changes

Cohort / File(s)	Summary
Docs: Themes list refresh docs/advanced-usage/themes.md	Rewrote the themes list: added multiple new theme repositories (e.g., Catppuccin, Dribbblish Dynamic, Lucid, Gruvify, Spotify Dark, Throwback, Dracula variants, SpicetifyCat), inserted a placeholder entry, introduced an "Unmaintained themes" section (moved items like dracula/spicetify), reordered entries, added a "Discover more themes on GitHub" link, and removed at least one previous item.

Sequence Diagram(s)

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

I twitch my ears at lists anew,
Fresh themes hop in, a vivid crew.
Old burrows marked "unmaintained" now,
New links to find more—take a bow.
I thump my feet; the docs renewed. 🐇

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The title clearly identifies the scope (docs/advanced-usage/themes) and succinctly describes the primary change—adding an "unmaintained" section to the documentation—matching the author’s stated objective and the modifications made in the themes.md file.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 5e5bf09 and 1c73443.

📒 Files selected for processing (1)

• docs/advanced-usage/themes.md (1 hunks)

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[coderabbitai]

Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between e32d45d and 5e5bf09.

📒 Files selected for processing (1)

• docs/advanced-usage/themes.md (1 hunks)