feat(cmake): Add CMake module (#1456)

* feat: CMake module

* docs: Document symbol variable

docs/config/README.md

@@ -187,6 +187,7 @@ $git_status\
 $hg_branch\
 $docker_context\
 $package\
+$cmake\
 $dotnet\
 $elixir\
 $elm\
@@ -425,6 +426,31 @@ error_symbol = "[➜](bold red) "
 vicmd_symbol = "[V](bold green) "
 ```
 
+## CMake
+
+The `cmake` module shows the currently installed version of CMake if:
+
+- The current directory contains a `CMakeLists.txt` file
+
+### Options
+
+| Option     | Default                            | Description                                  |
+| ---------- | ---------------------------------- | -------------------------------------------- |
+| `format`   | `"via [$symbol$version]($style) "` | The format for the module.                   |
+| `symbol`   | `"🛆 "`                             | The symbol used before the version of cmake. |
+| `style`    | `"bold blue"`                      | The style for the module.                    |
+| `disabled` | `false`                            | Disables the `cmake` module.                 |
+
+### Variables
+
+| Variable | Example   | Description                          |
+| -------- | --------- | ------------------------------------ |
+| version  | `v3.17.3` | The version of cmake                 |
+| symbol   |           | Mirrors the value of option `symbol` |
+| style\*  |           | Mirrors the value of option `style`  |
+
+\*: This variable can only be used as a part of a style string
+
 ## Command Duration
 
 The `cmd_duration` module shows how long the last command took to execute.