feat(cli): promote tasks commands from experimental to GA (#20916)

## Overview

This change promotes the tasks CLI commands from `coder exp task` to
`coder task`, marking them as generally available (GA).

## Migration

Users will need to update their scripts from:

```shell
coder exp task create "my task"
```

To:
```shell
coder task create "my task"
```

---

🤖 This change was written by Claude Sonnet 4.5 Thinking using [mux](https://github.com/coder/mux) and reviewed by a human 🏄🏻‍♂️

docs/reference/cli/task_status.md

@@ -0,0 +1,55 @@
+<!-- DO NOT EDIT | GENERATED CONTENT -->
+# task status
+
+Show the status of a task.
+
+Aliases:
+
+* stat
+
+## Usage
+
+```console
+coder task status [flags]
+```
+
+## Description
+
+```console
+  - Show the status of a given task.:
+
+     $ coder task status task1
+
+  - Watch the status of a given task until it completes (idle or stopped).:
+
+     $ coder task status task1 --watch
+```
+
+## Options
+
+### --watch
+
+|         |                    |
+|---------|--------------------|
+| Type    | <code>bool</code>  |
+| Default | <code>false</code> |
+
+Watch the task status output. This will stream updates to the terminal until the underlying workspace is stopped.
+
+### -c, --column
+
+|         |                                                                                                                                                                                                                                                                                                                                                                                                                                                |
+|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| Type    | <code>[id\|organization id\|owner id\|owner name\|owner avatar url\|name\|display name\|template id\|template version id\|template name\|template display name\|template icon\|workspace id\|workspace name\|workspace status\|workspace build number\|workspace agent id\|workspace agent lifecycle\|workspace agent health\|workspace app id\|initial prompt\|status\|state\|message\|created at\|updated at\|state changed\|healthy]</code> |
+| Default | <code>state changed,status,healthy,state,message</code>                                                                                                                                                                                                                                                                                                                                                                                        |
+
+Columns to display in table output.
+
+### -o, --output
+
+|         |                          |
+|---------|--------------------------|
+| Type    | <code>table\|json</code> |
+| Default | <code>table</code>       |
+
+Output format.