[FEATURE] Sidebar view for browsing all notes

[jnahian]

Feature Description

Add a dedicated sidebar view that displays all notes across the workspace in a browsable tree or list format.

Problem/Motivation

Currently, users can only see notes inline with their code via CodeLens indicators. There's no way to get an overview of all notes in the workspace or quickly navigate between notes across different files.

Proposed Solution

Create a VSCode sidebar panel (similar to Explorer, Search, etc.) that shows:

• All notes organized by file
• Note previews with truncated content
• Click to navigate to note location
• Collapsible file tree structure

Use Cases

• Get an overview of all notes in the project
• Quickly navigate to notes in different files
• Review all notes without opening each file
• Understand the distribution of notes across the codebase

Additional Context

This is a planned feature from the CHANGELOG.md [Unreleased] section.

Willing to Contribute?

• Yes, I'd like to implement this
• I can help with testing
• I'd like to help with documentation
• No, just suggesting the idea