add config docs

Author: bmiddha

vscode-extensions/debug-certificate-manager-vscode-extension/README.md

@@ -7,3 +7,31 @@ VS Code extension to manage debug TLS certificates and sync them to the VS Code
 The Debug Certificate Manager extension uses `@rushstack/debug-certificate-manager` to manage TLS certificates. It can also be used to sync certificates when connected to a VS Code remote workspace (WSL, Codespaces, Devcontainers, VS Code Tunnels).
 
 The extension reads `.vscode/debug-certificate-manager.json` for the certificate store path. When present, the extension will auto-activate and attempt to sync the certificates to the remote workspace.
+
+## Configuration
+
+### VS Code Settings
+
+```json
+{
+  "debugCertificateManager.autoSync": true,
+  "debugCertificateManager.keyFilename": "private-key.pem",
+  "debugCertificateManager.certificateFilename": "certificate.pem",
+  "debugCertificateManager.caCertificateFilename": "ca-certificate.pem",
+  "debugCertificateManager.storePath.windows": "C:\\path\\to\\store",
+  "debugCertificateManager.storePath.linux": "/path/to/store",
+  "debugCertificateManager.storePath.osx": "/path/to/store"
+}
+```
+
+### Workspace configuration
+
+
+```json
+{
+  "storePath": "workspace/relative/path",
+  "keyFilename": "private-key.pem",
+  "certificateFilename": "certificate.pem",
+  "caCertificateFilename": "ca-certificate.pem"
+}
+```