docs: add --version flag documentation and installation verification

Update documentation to include the new --version flag:

- CLI Reference: Add --version to global options table with usage example
- Getting Started: Update Step 3 verification to use 'hatch --version' first
- Installation Tutorial: Add version check to installation verification steps
- README: Add version check after installation instructions

The --version flag provides a quick way to verify successful installation
and check the installed Hatch version.

Related to: feature/hatch-version-command

Author: LittleCoinCoin

README.md

@@ -25,6 +25,12 @@ cd Hatch
 pip install -e .
 ```
 
+Verify installation:
+
+```bash
+hatch --version
+```
+
 ### Create a package template
 
 ```bash

docs/articles/users/CLIReference.md

@@ -30,10 +30,18 @@ These flags are accepted by the top-level parser and apply to all commands unles
 
 | Flag | Type | Description | Default |
 |------|------|-------------|---------|
+| `--version` | flag | Show program version and exit | n/a |
 | `--envs-dir` | path | Directory to store environments | `~/.hatch/envs` |
 | `--cache-ttl` | int | Cache time-to-live in seconds | `86400` (1 day) |
 | `--cache-dir` | path | Directory to store cached packages | `~/.hatch/cache` |
 
+Example:
+
+```bash
+hatch --version
+# Output: hatch 0.6.1
+```
+
 ## Commands
 
 Each top-level command has its own table. Use the Syntax line before the table to see how to call it.

docs/articles/users/GettingStarted.md

@@ -105,10 +105,14 @@ pip install -e .
 Test that Hatch is working:
 
 ```bash
-hatch --help
+hatch --version
 ```
 
-You should see available commands.
+You should see the installed version (e.g., `hatch 0.6.1`). You can also view available commands:
+
+```bash
+hatch --help
+```
 
 ## First Steps
 

docs/articles/users/tutorials/01-getting-started/01-installation.md

@@ -28,7 +28,13 @@ This article covers the installation of Hatch, a package manager for Model Conte
    pip install -e .
    ```
 
-3. Verify the installation by checking the available commands:
+3. Verify the installation by checking the version:
+
+   ```bash
+   hatch --version
+   ```
+
+   You should see output like `hatch 0.6.1`. You can also view available commands:
 
    ```bash
    hatch --help