Add WriteCommit VS Code extension

[PatrickRuddiman]

Summary

• create a VS Code extension that integrates the WriteCommit CLI
• add configuration for the OpenAI API key and executable path
• provide a Source Control panel action to generate a commit message
• automatically install WriteCommit if missing and parse the dry-run output
• show a spinner while the CLI runs
• document the extension in the main README
• add workflow for publishing the extension to the Marketplace

Testing

• npm install
• npm run build

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https://chatgpt.com/codex/tasks/task_e_68603c9820a4832aadd0b1bf236ce662

[Copilot]

Pull Request Overview

This PR introduces a VS Code extension that integrates the WriteCommit CLI to generate commit messages directly from the Source Control panel. Key changes include:

• Adding the VS Code extension project with TypeScript configuration.
• Implementing CLI installation, execution, and commit message generation.
• Providing configuration settings and a GitHub Actions workflow for publishing the extension.

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
vscode-extension/tsconfig.json	New TypeScript configuration for the extension project.
vscode-extension/src/extension.ts	Implementation of CLI integration, command registration, and progress UI.
vscode-extension/package.json	Defines extension manifest including commands and configuration settings.
vscode-extension/README.md	Documentation for extension features and usage.
README.md	General project documentation updated with extension usage instructions.
.github/workflows/publish-extension.yml	Workflow for publishing the extension to the VS Code Marketplace.

Comments suppressed due to low confidence (1)

vscode-extension/package.json:45

• The configuration property keys in package.json are prefixed with 'writecommit.' even though they are defined in the 'writecommit' configuration section. This causes a mismatch with the keys accessed in the extension code (e.g., 'openAIApiKey'). Consider renaming them to 'openAIApiKey' and 'executablePath' to align with the code.

        "writecommit.openAIApiKey": {