Add VSCode extension: Narrator Chronicle Explorer

Source/VSCodeExtension/.gitignore

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+out/
+node_modules/
+*.vsix
+.vscode-test/

Source/VSCodeExtension/.vscodeignore

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+.vscode/**
+.vscode-test/**
+src/**
+.gitignore
+node_modules/**
+tsconfig.json
+**/*.map
+**/*.ts
+!out/**

Source/VSCodeExtension/README.md

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+# Narrator - Chronicle Explorer
+
+A VS Code extension that integrates with [Cratis Chronicle](https://github.com/Cratis/Chronicle) to browse and explore event stores directly from VS Code.
+
+## Features
+
+- **Browse event stores**: Navigate event stores, namespaces, and observers in a dedicated sidebar panel.
+- **Context switching**: Switch between multiple Chronicle server contexts defined in `~/.cratis/config.json`.
+- **Auto-connect**: Automatically connects to the active context on startup.
+- **Config file watching**: Reloads configuration automatically when `~/.cratis/config.json` changes.
+
+## Configuration
+
+The extension reads connection settings from the same CLI config file used by the Cratis CLI:
+
+**`~/.cratis/config.json`**
+```json
+{
+  "activeContext": "default",
+  "contexts": {
+    "default": {
+      "server": "chronicle://localhost:35000",
+      "managementPort": 8080
+    }
+  }
+}
+```
+
+You can also override the config path in VS Code settings:
+
+```json
+{
+  "narrator.configPath": "/path/to/custom/config.json"
+}
+```
+
+## Commands
+
+| Command | Description |
+|---------|-------------|
+| `Narrator: Refresh` | Reload the Chronicle Explorer tree |
+| `Narrator: Connect to Chronicle` | Connect (prompts for server URL if not configured) |
+| `Narrator: Set Active Context` | Switch between configured Chronicle contexts |
+| `Narrator: Open Narrator Settings` | Open VS Code settings for the extension |
+
+## Build
+
+```bash
+cd Source/VSCodeExtension
+npm install
+npm run compile
+```
+
+To package:
+```bash
+npm run vscode:prepublish
+npx vsce package
+```