docs: Big reorganize (#45276)

Release Notes:

- N/A 

Overview

Restructures the documentation navigation to be organized by user goals
rather than feature lists. Introduces a new "Working with Code" section
and reorganizes existing content into clearer groupings.

### Navigation Changes

**New top-level sections:**
- **Working with Code** — Groups editing, navigation, and execution
features by workflow
- **Reference** — Dedicated section for lookup-only content (settings,
actions, CLI)
- **Coming From...** — Migration guides grouped together

**Reorganized sections:**
- **Customization** — Renamed from "Configuration," focused on
appearance and keybindings
- **Account & Privacy** — Consolidated auth, privacy, and telemetry
pages

New Files

| File | Purpose |
|------|---------|
| `editing-code.md` | Overview page for editing features |
| `finding-navigating.md` | Overview page for navigation tools with
quick reference |
| `running-testing.md` | Overview page for tasks, debugger, and REPL |
| `reference/all-settings.md` | Settings reference (moved/renamed) |
| `reference/cli.md` | CLI reference (moved) |

### Content Moves

| Page | From | To |
|------|------|-----|
| Snippets | Customization | Working with Code → Editing Code |
| Code Completions | (flat) | Working with Code → Editing Code |
| Diagnostics | (flat) | Working with Code → Editing Code |
| Multibuffers | (flat) | Working with Code → Editing Code |
| Command Palette | (flat) | Working with Code → Finding & Navigating |
| Outline Panel | (flat) | Working with Code → Finding & Navigating |
| Tab Switcher | (flat) | Working with Code → Finding & Navigating |
| Tasks | (flat) | Working with Code → Running & Testing |
| Debugger | (flat) | Working with Code → Running & Testing |
| REPL | (flat) | Working with Code → Running & Testing |
| All Settings | Configuration | Reference |
| CLI | (various) | Reference

---------

Co-authored-by: Marshall Bowers <git@maxdeviant.com>
Co-authored-by: Zed Zippy <234243425+zed-zippy[bot]@users.noreply.github.com>

docs/src/languages/javascript.md

@@ -12,7 +12,7 @@ JavaScript support is available natively in Zed.
 Formatting on save is enabled by default for JavaScript, using TypeScript's built-in code formatting.
 But many JavaScript projects use other command-line code-formatting tools, such as [Prettier](https://prettier.io/).
 You can use one of these tools by specifying an _external_ code formatter for JavaScript in your settings.
-See [the configuration docs](../configuring-zed.md) for more information.
+See [the configuration docs](../reference/all-settings.md) for more information.
 
 For example, if you have Prettier installed and on your `PATH`, you can use it to format JavaScript files by adding the following to your `settings.json`: