XENotes/notes-app

[yash20720]

i started implementing notes app.
key features:

1. Formatting Toolbar (WYSIWYG Control)
   Style Selectors: Buttons to switch line elements between H1 (Heading), P (Paragraph), and L (List) block types.
   Style Modifiers: B (Bold) toggle (simulated via 1px canvas offset drawing).
   Color Palette: 5 color boxes (White, Red, Green, Blue, Yellow) to paint individual blocks dynamically.

2. Smart List Auto-Numbering
   Consecutive list blocks (BLOCK_TYPE_LIST) automatically calculate and display sequential numbers (1., 2., 3., etc.), resetting if interrupted by paragraph/heading lines.

3. Multi-Tab Document Bar
   Supports up to 8 concurrently open tabs.
   Integrates an unsaved draft/dirty indicator (displaying * next to the filename when modified) that disappears instantly upon saving.

4. Integrated Notes Sidebar
   Automatically scans the /notes directory (creating it if it does not exist) using kernel VFS listing system calls (_KeOpenDir / _KeReadDir) to populate and load existing notes with one click.

5. Vim-Inspired Command Bar
   Pressing : activates the bottom command box, allowing developer-friendly keyboard shortcuts:
   :w — Saves the active note to disk.
   :new — Instantly opens a new note tab and directory shortcut.
   :q — Closes the application.

6. Real-time Document Statistics
   Displays dynamic counts of lines, words, and characters for the active note on the left side of the bottom status bar.

7. Format-Preserving Serialization
   Notes are saved with a lightweight tag format (e.g., [H][color=FFFF4B4B][bold=1]Heading Text). The load parser parses these tags line-by-line to restore document layouts, colors, and formatting on load.