feat(cli): add coder stat command (#8005)

docs/cli/stat.md

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+<!-- DO NOT EDIT | GENERATED CONTENT -->
+
+# stat
+
+Show resource usage for the current workspace.
+
+## Usage
+
+```console
+coder stat [flags]
+```
+
+## Subcommands
+
+| Name                                | Purpose                          |
+| ----------------------------------- | -------------------------------- |
+| [<code>cpu</code>](./stat_cpu.md)   | Show CPU usage, in cores.        |
+| [<code>disk</code>](./stat_disk.md) | Show disk usage, in gigabytes.   |
+| [<code>mem</code>](./stat_mem.md)   | Show memory usage, in gigabytes. |
+
+## Options
+
+### -c, --column
+
+|         |                                                                            |
+| ------- | -------------------------------------------------------------------------- |
+| Type    | <code>string-array</code>                                                  |
+| Default | <code>host_cpu,host_memory,home_disk,container_cpu,container_memory</code> |
+
+Columns to display in table output. Available columns: host cpu, host memory, home disk, container cpu, container memory.
+
+### -o, --output
+
+|         |                     |
+| ------- | ------------------- |
+| Type    | <code>string</code> |
+| Default | <code>table</code>  |
+
+Output format. Available formats: table, json.