docs: Add Shell Script language documentation (#23248)

docs/src/languages.md

@@ -55,6 +55,7 @@ Zed supports hundreds of programming languages and text formats. Some work out-o
 - [Rust](./languages/rust.md)
 - [Scala](./languages/scala.md)
 - [Scheme](./languages/scheme.md)
+- [Shell Script](./languages/sh.md)
 - [Svelte](./languages/svelte.md)
 - [Swift](./languages/swift.md)
 - [TailwindCSS](./languages/tailwindcss.md)

docs/src/languages/bash.md

@@ -8,17 +8,29 @@ Report issues to: [https://github.com/d1y/bash.zed/issues](https://github.com/d1
 
 ## Configuration
 
-The bash-language-server support shellcheck. But you need to install it manually:
+When `shellcheck` is available `bash-language-server` will use it internally to provide diagnostics.
+
+### Install `shellcheck`:
 
 ```sh
-# macOS
+brew install shellcheck             # macOS (HomeBrew)
-brew install shellcheck
+apt-get install shellcheck          # Ubuntu/Debian
+pacman -S shellcheck                # ArchLinux
+dnf install shellcheck              # Fedora
+yum install shellcheck              # CentOS/RHEL
+zypper install shellcheck           # openSUSE
+choco install shellcheck            # Windows (Chocolatey)
+```
 
-# Ubuntu/Debian
+And verify it is available from your path:
-sudo apt-get install shellcheck
 
-# Arch Linux
+```sh
-pacman -S shellcheck
+which shellcheck
+shellcheck --version
 ```
 
 If you wish to customize the warnings/errors reported you just need to create a `.shellcheckrc` file. You can do this in the root of your project or in your home directory (`~/.shellcheckrc`). See: [shellcheck documentation](https://github.com/koalaman/shellcheck/wiki/Ignore#ignoring-one-or-more-types-of-errors-forever) for more.
+
+### See also:
+
+- [Zed Docs: Language Support: Shell Scripts](./sh.md)

docs/src/languages/sh.md

@@ -0,0 +1,62 @@
+# Shell Scripts
+
+Shell Scripts (bash, zsh, dash, sh) are supported natively by Zed.
+
+- Tree Sitter: [tree-sitter/tree-sitter-bash](https://github.com/tree-sitter/tree-sitter-bash)
+
+## Settings
+
+You can configure various settings for Shell Scripts in your Zed User Settings (`~/.config/zed/settings.json`) or Zed Project Settings (`.zed/settings.json`):
+
+```json
+  "languages": {
+    "Shell Script": {
+      "tab_size": 2,
+      "hard_tabs": false
+    }
+  }
+```
+
+### Formatting
+
+Zed supports auto-formatting Shell Scripts using external tools like [`shfmt`](https://github.com/patrickvane/shfmt).
+
+1. Install `shfmt`:
+
+```sh
+brew install shfmt            # macos (homebrew)
+sudo apt-get install shfmt    # debian/ubuntu
+dnf install shfmt             # fedora
+yum install shfmt             # redhat
+pacman -Sy shfmt              # archlinux
+choco install shfmt           # windows (chocolatey)
+```
+
+2. Ensure `shfmt` is available in your path and check the version:
+
+```sh
+which shfmt
+shfmt --version
+```
+
+3. Configure Zed to automatically format Shell Scripts with `shfmt` on save:
+
+```json
+  "languages": {
+    "Shell Script": {
+      "format_on_save": "on",
+      "formatter": {
+        "external": {
+          "command": "shfmt",
+          // Change `--indent 2` to match your preferred tab_size
+          "arguments": ["--filename", "{buffer_path}", "--indent", "2"]
+        }
+      }
+    }
+  }
+```
+
+## See also:
+
+- [Zed Docs: Language Support: Bash](./bash.md)
+- [Zed Docs: Language Support: Fish](./fish.md)