feat: add corepack cleanup command

sources/commands/Cache.ts

@@ -0,0 +1,22 @@
+import {Command}          from 'clipanion';
+import fs                 from 'fs';
+
+import {getInstallFolder} from '../folderUtils';
+import type {Context}     from '../main';
+
+export class CacheCommand extends Command<Context> {
+  static paths = [
+    [`cache`, `clean`],
+  ];
+
+  static usage = Command.Usage({
+    description: `Cleans Corepack cache`,
+    details: `
+      Removes Corepack cache directory from your local disk.
+    `,
+  });
+
+  async execute() {
+    await fs.promises.rm(getInstallFolder(), {recursive: true, force: true});
+  }
+}

sources/main.ts

@@ -3,6 +3,7 @@ import {BaseContext, Builtins, Cli, Command, Option, UsageError} from 'clipanion
 import {version as corepackVersion}                              from '../package.json';
 
 import {Engine}                                                  from './Engine';
+import {CacheCommand}                                            from './commands/Cache';
 import {DisableCommand}                                          from './commands/Disable';
 import {EnableCommand}                                           from './commands/Enable';
 import {InstallGlobalCommand}                                    from './commands/InstallGlobal';
@@ -117,6 +118,7 @@ export async function runMain(argv: Array<string>) {
     cli.register(Builtins.HelpCommand);
     cli.register(Builtins.VersionCommand);
 
+    cli.register(CacheCommand);
     cli.register(DisableCommand);
     cli.register(EnableCommand);
     cli.register(InstallGlobalCommand);