✨ Dotnet SDK install command

commands/dotnet.mjs

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+import program from '../index.mjs';
+import { Printer } from '../utils/printer.mjs';
+import { runShellCommand, commandExists } from '../helpers/shell-command.mjs';
+
+const printer = new Printer('dotnet');
+
+program
+  .command('dotnet')
+  .description('Install dotnet SDK for a specific version')
+  .argument('[version]', 'SDK version to install (e.g. 8.0)', '8.0')
+  .option('-u, --uninstall', 'Uninstalls dotnet SDK for given version')
+  .action(async (version, { uninstall }) => {
+    const brewExists = await commandExists('brew');
+    if (!brewExists) {
+      printer.error('Homebrew is required to install dotnet SDK');
+      printer.neutral('Install homebrew from: https://brew.sh');
+      quit(1);
+    }
+
+    if (uninstall) {
+      printer.info(`Uninstalling dotnet SDK ${version}...`);
+      await runShellCommand('brew', [`uninstall dotnet@${version}`]);
+      quit(0);
+    }
+
+    printer.info(`Installing dotnet SDK ${version}...`);
+
+    try {
+      await runShellCommand('brew', [`install dotnet@${version}`]);
+      printer.success(`Dotnet SDK ${version} installed successfully!`);
+
+      printer.info('Adding SDK to path...');
+      await runShellCommand(
+        `echo 'export PATH="/usr/local/share/dotnet:$PATH"' >> ~/.zshrc`
+      );
+
+      printer.done('Dotnet SDK installation complete!');
+      printer.success('Restart your terminal or run: source ~/.zshrc');
+    } catch (error) {
+      printer.error('Failed to install dotnet SDK', error);
+      quit(1);
+    }
+  });