feat: add "Install Hermione" action

README.md

@@ -1,2 +1,18 @@
 # vscode-hermione
-Integration Hermione with VS Code
+
+This extension supports [Hermione][hermione] features in VS Code environment. Available features:
+
+- [Install Hermione](#install-hermione)
+- [Using the REPL mode][#using-the-repl-mode]
+
+## Install Hermione
+
+If you are not using hermione yet or starting a new testing project, the "Install Hermione" action from the command panel will help you get started.
+
+## Using the REPL mode
+
+Adds a keybinding (`cmd+shift+8` for mac and `ctrl+shift+8` for others) to run a dedicated section of code in the VSCode terminal. More info about [REPL mode][hermione-repl-mode]. You can overwrite this keybinding in [keyboard shortcuts][vscode-keyboard-shortcuts].
+
+[hermione]: https://github.com/gemini-testing/hermione
+[hermione-repl-mode]: https://github.com/gemini-testing/hermione?tab=readme-ov-file#repl-mode
+[vscode-keyboard-shortcuts]: https://code.visualstudio.com/docs/getstarted/keybindings

src/extension.ts

@@ -0,0 +1,23 @@
+import * as vscode from "vscode";
+
+export function activate(context: vscode.ExtensionContext): void {
+    const disposable = vscode.commands.registerCommand("hrm.install", async () => {
+        const [workspaceFolder] = vscode.workspace.workspaceFolders || [];
+        if (!workspaceFolder) {
+            await vscode.window.showErrorMessage("Open a folder in VS Code to initialize Hermione");
+            return;
+        }
+
+        const terminal = vscode.window.createTerminal({
+            name: "Install Hermione",
+            cwd: workspaceFolder.uri.fsPath,
+            env: process.env,
+        });
+
+        terminal.show();
+
+        terminal.sendText(`npm init hermione-app -- --yes`, true);
+    });
+
+    context.subscriptions.push(disposable);
+}