feat: adopt obsidian 1.11 settings APIs

[chhoumann]

Summary

• Update settings tab to use Obsidian 1.11 grouping/components and set a new icon.
• Fix deprecated notice rendering API usage.
• Bump Obsidian dev dependency and min app version; update type/stub support.

Testing

• Not run

Summary by CodeRabbit

• New Features

  • Settings reorganized into grouped sections for easier navigation (Choices & Packages, Input, Templates & Properties, Notifications, Global Variables, AI & Online, Appearance, Developer)
  • Settings tab now shows a dedicated icon
  • Development info/tools shown in a Developer section (dev builds only)

• Bug Fixes / Improvements

  • Improved rendering and lifecycle of settings UI to prevent duplicate/misaligned components
  • Improved "no scripts found" notice rendering

• Chores

  • Minimum required app version raised to 1.11.0

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