feat(cli): add main cli

cli.ts

@@ -0,0 +1,17 @@
+import config from './deno.json' with { type: 'json' }
+import { Command } from '@cliffy/command/command.ts'
+import { cmd: send } from './cli/send.ts'
+
+const cli = new Command()
+	.name('cohamail')
+	.description('Mail cli for coh@bit.')
+	.version(config.version)
+	.command('send', send)
+
+if (import.meta.main) {
+	if (Deno.args.length) {
+		cli.parse(Deno.args)
+	} else {
+		cli.showHelp()
+	}
+}