Moving regex patterns to a config file (stripe#176)

This json file will soon be updated to support multiple languages. In addition:
* Added run configurations to allow attaching to the language server for debugging purposes.
* Updated Readme for debugging the extension.
* Moved the snippets configuration into the config directory.

.vscode/launch.json

@@ -4,7 +4,16 @@
 // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
 {
 	"version": "0.2.0",
-	"configurations": [{
+	"configurations": [
+	{
+		"type": "node",
+		"request": "attach",
+		"name": "Attach to Language Server",
+		"port": 6009,
+		"restart": true,
+		"outFiles": ["${workspaceRoot}/out/stripeLanguageServer/**/*.js"]
+	},
+	{
 			"name": "Run Extension",
 			"type": "extensionHost",
 			"request": "launch",
@@ -20,5 +29,11 @@
 				"EXTENSION_MODE": "development"
 			}
 		}
+	],
+	"compounds": [
+		{
+			"name": "Client + Server",
+			"configurations": ["Run Extension", "Attach to Language Server"]
+		}
 	]
 }

README.md

@@ -34,14 +34,20 @@ Contributions and feedback to the project are welcome, so please open issues for
    - Right click "Stripe" from the Extensions marketplace
    - Click Disable (Workspace)
 
+### Debugging this extension
+
+1. Open the Run view, select the "Run Extension" button to launch an additional Extension Development Host instance of VSCode that executes the extension code in your workspace.
+1. To debug the stripe language server, select the "Client + Server" button. This will allow you to set breakpoints for code that lives within the stripeLanguageServer directory.
+   - You can find more info on the language server here: https://code.visualstudio.com/api/language-extensions/language-server-extension-guide
+
 ## License
 
 See [LICENSE.md](LICENSE.md)
+
 ## Telemetry
 
 The Stripe VS Code Extension collects basic telemetry in order to improve this extension's experience. If you'd like to opt out we respect the [global telemetry setting in VS Code](https://code.visualstudio.com/docs/getstarted/telemetry), so we won't collect any data unless this setting is turned on.
 
-
 ## Third-Party Notices
 
 | Name                               | Description                                                         | Version |    Size | License |