feat(readme): extend the readme with more info

README.md

@@ -1,5 +1,44 @@
 # Mechvibes Lite
-Under construction.
+Mechvibes Lite is a lightweight alternative to Mechvibes. It boasts full compatibility with the original version.
 
 # Documentation
 Please visit <https://mechvibes-lite.pages.dev/> for documentation.
+
+# Installation
+Please read the [relevant documentation](https://mechvibes-lite.pages.dev/#installation).
+
+# Usage
+Please read the [relevant documentation](https://mechvibes-lite.pages.dev/#usage).
+
+# Command-line Arguments
+```shell
+usage: mvibes [-h] [-L LOG_LEVEL] [--no-config] [--with-config WITH_CONFIG]
+              [--theme-dir THEME_DIR] [--theme-folder-name THEME_FOLDER_NAME]
+              [--wskey-host WSKEY_HOST] [--wskey-port WSKEY_PORT] [--no-wskey]
+              {daemon,wskey} ...
+
+Mechvibes Lite is an alternative to Mechvibes (it plays sounds when you press
+keys).
+
+positional arguments:
+  {daemon,wskey}
+    daemon              Run the keyboard input player as a daemon
+    wskey               WebSocket server for sending keyboard input
+
+options:
+  -h, --help            show this help message and exit
+  -L LOG_LEVEL, --log-level LOG_LEVEL
+                        Set log level. Options: DEBUG, INFO (default),
+                        CRITICAL, ERROR
+  --no-config           Don't read config file from standard locations. Will
+                        error if you don't provide required configuration as
+                        flags instead.
+  --with-config WITH_CONFIG
+                        Load this configuration instead of the one at the
+                        standard location. Can be - for stdin.
+  --theme-dir THEME_DIR
+  --theme-folder-name THEME_FOLDER_NAME
+  --wskey-host WSKEY_HOST
+  --wskey-port WSKEY_PORT
+  --no-wskey
+```