Add basic 'is plugin type' test.

Author: felixfontein

src/ansible.ts

@@ -7,3 +7,8 @@
 export function isFQCN(input: string): boolean {
   return input.match(/^[a-z0-9_]+\.[a-z0-9_]+(?:\.[a-z0-9_]+)+$/) !== null;
 }
+
+export function isPluginType(input: string): boolean {
+  /* We do not want to hard-code a list of valid plugin types that might be inaccurate, so we simply check whether this is a valid kind of Python identifier usually used for plugin types. If ansible-core ever adds one with digits, we'll have to update this. */
+  return /^[a-z_]+$/.test(input);
+}