Add common AutoHotkey extensions

[Banaanae]

Adds common AutoHotkey extensions

Description

Adds the following extensions:

• ah1
• ah2

Checklist:

• [X] I am adding a new extension to a language.
  • [X] The new extension is used in hundreds of repositories on GitHub.com
    • Search results for each extension:
      • https://github.com/search?q=NOT+is%3Afork+path%3A*.ah1+%3A%3D&type=code
      • https://github.com/search?q=NOT+is%3Afork+path%3A*.ah2+%3A%3D&type=code
  • [X] I have included a real-world usage sample for all extensions added in this PR:
    • Sample source(s):
      • Wrote my own
    • Sample license(s):
    • MIT
  • [ ] I have included a change to the heuristics to distinguish my language from others using the same extension.