docs: replace stale argparse usage dump with Click command reference

The Usage section showed the old argparse `./smileyface.py -h` output
(underscored command names, 'optional arguments', a stray 'Invalid
command' line) from before the Click rewrite. Replace it with the
actual Click command list - server build/deploy commands and the
scrape subgroup - plus a note on env/.env configuration.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

README.md

@@ -27,30 +27,39 @@ To run the matrix locally (requires [uv](https://docs.astral.sh/uv/)):
 
 Usage
 ======
+SmileyFace exposes a [Click](https://click.palletsprojects.com) CLI. List all
+commands and options with:
 
-$ ./smileyface.py -h
+    python smileyface.py --help
-usage: smileyface.py [-h] command ...
 
-positional arguments:
+Show help for a specific command:
-  command
-    clean_instance      Deletes the generated instance on the local machine.
-    create_directories  Create required directories which the user installs maps, mutators, and config to.
-    download_linux_server
-                        Download the latest Linux Unreal Tournament 4 Server from Epic
-    download_logs       Download the logs from the target hub.
-    generate_instance   Takes the current coniguration and outputs the application files which can be copied
-                        to the server.
-    oneclickdeploy
-    restart_server
-    start_server        Flip on the target hub on for Fragging.
-    stop_server         Stop UT4 Hub processes on the server.
-    upload_redirects    Upload paks to redirect server.
-    upload_server       Upload all required game files to the hub server.
-    scrape              sub-submenu help
 
-optional arguments:
+    python smileyface.py generate-instance --help
-  -h, --help            show this help message and exit
+
-Invalid command. Try -h for usage
+Server build & deploy commands:
+
+    oneclickdeploy          Generate instance, upload redirects, and upload server.
+    generate-instance       Build local server instance from current configuration.
+    upload-redirects        Upload paks to the redirect server.
+    upload-server           Upload game files to the hub server.
+    clean-instance          Delete the generated instance on the local machine.
+    create-directories      Create required directories for maps, mutators, and config.
+    download-linux-server   Download the latest Linux UT4 Server from Epic.
+    download-logs           Download the logs from the target hub.
+    start-server            Start the UT4 server.
+    stop-server             Stop the UT4 server.
+    restart-server          Restart the UT4 server.
+
+Content-scraping commands (under the `scrape` subgroup):
+
+    scrape ut4pugs          Check ut4pugs.us for latest content.
+    scrape utcc             Check utcc.unrealpugs.com for latest content.
+    scrape create-db-table  Create database tables.
+    scrape load-md5s        Load MD5 checksums from local pak files.
+    scrape print-invalid    Print pak files that failed validation.
+
+Configuration is read from `SMILEYFACE_`-prefixed environment variables or a
+`.env` file; see `.env.example` for the full list.
 
 # Contact
  * mat@zavage.net