Remove stale labels and ignore stale issues with comments (#58)

* Ignore issues that have recent comments and ignore the stale label. Defaulting to this behavior but added an option to turn it off.
* Fix up tests a bit to make this runnable. Add a test for the logic.
* Add vscode debugging configuration.

src/main.ts

@@ -32,6 +32,9 @@ function getAndValidateArgs(): IssueProcessorOptions {
     operationsPerRun: parseInt(
       core.getInput('operations-per-run', {required: true})
     ),
+    removeStaleWhenUpdated: !(
+      core.getInput('remove-stale-when-updated') === 'false'
+    ),
     debugOnly: core.getInput('debug-only') === 'true'
   };