Update public content 2025-02-11 (#51)

* cleanup: Remove old submodule

* Update public content and fix submodule reference

- Update submodule '_obsidian' to latest commit (c02677867887b834b98b2caf224f883a7b671be4)
- Sync latest public content changes

Automated update from obsidian-vault
Timestamp: 2025-02-11 18:15:39 UTC
Triggered by: push

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Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: kirill-markin