add help command

src/commands/help.ts

@@ -0,0 +1,33 @@
+import packageJson from "../../package.json";
+
+export function showHelp() {
+    console.log(`cftop v${packageJson.version}
+Terminal UI for viewing and monitoring Cloudflare Workers
+
+USAGE:
+    cftop <command> [options]
+
+COMMANDS:
+    start              Start the interactive terminal UI
+    init               Initialize configuration
+    help               Show this help message
+    version            Show version number
+    config             Show current configuration
+    test-observability Test observability API connection
+
+OPTIONS:
+    -h, --help                    Show this help message
+    -t, --apiToken <token>        Cloudflare API token
+    -a, --accountId <id>           Cloudflare account ID
+    --accessKey <key>              R2 access key ID (optional)
+    --secretKey <key>              R2 secret access key (optional)
+
+EXAMPLES:
+    cftop init --apiToken=<token> --accountId=<id>
+    cftop start
+    cftop help
+    cftop --help
+
+For more information, visit: https://github.com/NWBY/cftop
+`);
+}