feat(edit-docs): integrate release notes into repo

docs/Release Notes/Release Notes/v0.90.9-beta.md

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+# v0.90.9-beta
+## 🐞 Bugfixes
+
+*   [Promoted boolean attributes no long showing checkbox when the value is true](https://github.com/TriliumNext/Notes/issues/503)
+*   [Import of .htm keeps htm in title while html does not](https://github.com/TriliumNext/Notes/issues/500)
+
+## ✨ Improvements
+
+*   [Syntax highlighting in read-only mode code notes](https://github.com/TriliumNext/Notes/issues/504) (also for “View source”).
+*   [Server 404 logs are now one-line instead of a full stack trace](https://github.com/TriliumNext/Notes/issues/505)
+
+## 🌍 Internationalization
+
+*   Translated the toast notifications, errors and confirmation boxes.
+*   Translated the launcher context menu.
+
+## ⬆️ Library updates
+
+*   i18next: 23.16.0 -> 23.16.2
+*   mind-elixir: 4.2.0 -> 4.2.2
+*   vanilla-js-wheel-zoom: 9.0.2 -> 9.0.4
+*   cookie-parser: 1.4.6 → 1.4.7
+*   image-type: 4.1.0 → 5.2.0
+*   express, express-rate-limit, express-session updated to latest.
+*   cookie-parser: 1.4.6 → 1.4.7
+*   marked: 14.1.2 → 14.1.3
+*   sanitize-html: 2.13.0 → 2.13.1
+*   force-graph: 1.43.5 → 1.45.0
+*   and others (jasmine, debounce)