fix: replace retired shields.io Marketplace badges (#82)

Shields.io retired the visual-studio-marketplace endpoint in April
2026. Switch to vsmarketplacebadges.dev which is the community and
Microsoft-approved replacement.

Signed-off-by: Sebastien Tardif <sebtardif@ncf.ca>

Author: SebTardif

README.md

@@ -13,8 +13,8 @@
 [![OpenSSF Best Practices](https://www.bestpractices.dev/projects/13100/badge)](https://www.bestpractices.dev/projects/13100)
 [![FOSSA Status](https://img.shields.io/badge/license%20scan-FOSSA-blue)](https://app.fossa.com/projects/git%2Bgithub.com%2Fpatchloom%2Fpatchloom-vscode)
 [![Release](https://img.shields.io/github/v/release/patchloom/patchloom-vscode?logo=github&sort=semver)](https://github.com/patchloom/patchloom-vscode/releases/latest)
-[![VS Code Marketplace](https://img.shields.io/visual-studio-marketplace/v/patchloom.patchloom)](https://marketplace.visualstudio.com/items?itemName=patchloom.patchloom)
-[![Installs](https://img.shields.io/visual-studio-marketplace/i/patchloom.patchloom)](https://marketplace.visualstudio.com/items?itemName=patchloom.patchloom)
+[![VS Code Marketplace](https://vsmarketplacebadges.dev/version/patchloom.patchloom.svg)](https://marketplace.visualstudio.com/items?itemName=patchloom.patchloom)
+[![Installs](https://vsmarketplacebadges.dev/installs/patchloom.patchloom.svg)](https://marketplace.visualstudio.com/items?itemName=patchloom.patchloom)
 [![Open VSX](https://img.shields.io/open-vsx/v/patchloom/patchloom)](https://open-vsx.org/extension/patchloom/patchloom)
 
 The official VS Code extension for [Patchloom](https://github.com/patchloom/patchloom). Set up your workspace for AI agent workflows in seconds: detect the CLI, generate agent rules, configure MCP servers, and run structured file operations from the command palette.