docs: Apply documentation standards across all docs (#49177)

## Summary

Comprehensive remediation of 146 documentation files to align with Zed's
documentation conventions and brand voice guidelines.

## Changes

### YAML Frontmatter
- Added `title` and `description` frontmatter to all docs missing it

### Settings UI Pattern
- Updated 48+ files to show Settings Editor before JSON examples
- Pattern: `Configure X in Settings ({#kb zed::OpenSettings}), or add to
your settings file:`
- Added `([how to edit](./configuring-zed.md#settings-files))` links for
JSON-only settings

### Brand Voice Fixes
- Removed exclamation points (command-palette, key-bindings, repl,
privacy-and-security, etc.)
- Simplified em dash chains to parentheticals (environment,
troubleshooting, agent-panel, etc.)
- Fixed marketing language (yarn.md intro, development/linux.md)

### Terminology Alignment
- `settings UI` -> `Settings Editor`
- `sidebar` -> specific panel names (Project Panel, Collab Panel)
- `directory` -> `folder` in non-technical contexts
- `workspace` -> `project` in non-LSP contexts
- `Command Palette` -> `command palette` (lowercase)

### Callout Standardization
- Converted various callout formats to standard `> **Note:**` pattern

## Related

Depends on conventions established in #49176.

Release Notes:

- N/A

docs/src/languages/lua.md

@@ -1,3 +1,8 @@
+---
+title: Lua
+description: "Configure Lua language support in Zed, including language servers, formatting, and debugging."
+---
+
 # Lua
 
 Lua support is available through the [Lua extension](https://github.com/zed-extensions/lua).
@@ -7,7 +12,7 @@ Lua support is available through the [Lua extension](https://github.com/zed-exte
 
 ## luarc.json
 
-To configure LuaLS you can create a `.luarc.json` file in the root of your workspace.
+To configure LuaLS you can create a `.luarc.json` file in the root of your project.
 
 ```json [settings]
 {
@@ -88,7 +93,7 @@ Then in your `.luarc.json`:
 
 To enable [Inlay Hints](../configuring-languages.md#inlay-hints) for LuaLS in Zed
 
-1. Add the following to your Zed settings.json:
+1. Configure inlay hints in Settings ({#kb zed::OpenSettings}) under Languages > Lua, or add to your settings file:
 
 ```json [settings]
   "languages": {
@@ -118,7 +123,7 @@ To enable auto-formatting with your LuaLS (provided by [CppCXY/EmmyLuaCodeStyle]
 }
 ```
 
-Then add the following to your Zed `settings.json`:
+Configure formatting in Settings ({#kb zed::OpenSettings}) under Languages > Lua, or add to your settings file:
 
 ```json [settings]
 {
@@ -138,7 +143,7 @@ You can customize various EmmyLuaCodeStyle style options via `.editorconfig`, se
 Alternatively to use [StyLua](https://github.com/JohnnyMorganz/StyLua) for auto-formatting:
 
 1. Install [StyLua](https://github.com/JohnnyMorganz/StyLua): `brew install stylua` or `cargo install stylua --features lua52,lua53,lua54,luau,luajit` (feel free to remove any Lua versions you don't need).
-2. Add the following to your `settings.json`:
+2. Configure formatting in Settings ({#kb zed::OpenSettings}) under Languages > Lua, or add to your settings file:
 
 ```json [settings]
 {
@@ -162,7 +167,7 @@ Alternatively to use [StyLua](https://github.com/JohnnyMorganz/StyLua) for auto-
 }
 ```
 
-You can specify various options to StyLua either on the command line above (like `--syntax=Lua54`) or in a `stylua.toml` in your workspace:
+You can specify various options to StyLua either on the command line above (like `--syntax=Lua54`) or in a `stylua.toml` in your project:
 
 ```toml
 syntax = "Lua54"