feat: add StackBlitz WebContainer configuration

- Add .stackblitzrc with terminal view and auto-compilation
- Add .stackblitzignore to exclude unnecessary files
- Add .stackblitz/README.md with usage instructions
- Add StackBlitz badge to main README with terminal-only view

This allows users to run the CLI directly in their browser via StackBlitz
with a distraction-free terminal interface.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: katspaugh

.stackblitz/README.md

@@ -0,0 +1,53 @@
+# Running Safe CLI in StackBlitz
+
+This project is configured to run in StackBlitz's WebContainer environment.
+
+## Quick Start Links
+
+**Terminal View (Recommended):**
+- Direct link: `https://stackblitz.com/github/5afe/safe-cli-nodejs?view=terminal`
+- Or use: `https://stackblitz.com/~/github/5afe/safe-cli-nodejs` (tilde prefix opens terminal)
+
+**Editor View:**
+- Standard link: `https://stackblitz.com/github/5afe/safe-cli-nodejs`
+
+## Usage
+
+1. The dependencies will install automatically when you open the project
+2. The CLI will build and start automatically
+3. Use the terminal to run commands like:
+   ```bash
+   safe config init
+   safe wallet import
+   safe account create
+   ```
+
+## Available Commands
+
+See the main README.md for all available commands. Some highlights:
+
+- `safe config init` - Initialize configuration
+- `safe wallet import` - Import a wallet
+- `safe account create` - Create a new Safe account
+- `safe tx create` - Create a transaction
+
+## Notes
+
+- All data is stored in the WebContainer's virtual filesystem
+- Configuration is saved in `.config/safe-cli/` within the container
+- The CLI works fully interactively in the StackBlitz terminal
+
+## Development
+
+If you want to make changes:
+
+```bash
+# Watch mode for development
+npm run dev
+
+# Build manually
+npm run build
+
+# Run tests
+npm test
+```

.stackblitzignore

@@ -0,0 +1,12 @@
+# Don't sync these files to StackBlitz
+node_modules
+dist
+.git
+*.log
+.DS_Store
+.env
+.env.local
+coverage
+.cache
+.vscode
+.idea

.stackblitzrc

@@ -0,0 +1,9 @@
+{
+  "installDependencies": true,
+  "startCommand": "npm run build && npm start",
+  "env": {
+    "NODE_ENV": "development"
+  },
+  "compileTrigger": "auto",
+  "view": "terminal"
+}

README.md

@@ -2,6 +2,8 @@
 
 Modern, interactive CLI for Safe Smart Account management. Built on top of the [Safe Core SDK](https://github.com/safe-global/safe-core-sdk).
 
+[![Open in StackBlitz](https://developer.stackblitz.com/img/open_in_stackblitz.svg)](https://stackblitz.com/github/5afe/safe-cli-nodejs?view=terminal&hideNavigation=1&hideDevTools=1&terminalHeight=100)
+
 ## Features
 
 - 🔐 Secure wallet management with encrypted storage