Extension tutorial: Update with real functional extension example(s)

[friday]

Description

From https://github.com/Ulauncher/Ulauncher/pull/1097#issuecomment-1196054319:

I think we should move this extension to the Ulauncher repos and also use it for the documentation since it's extremely simple, yet demonstrating a valid use case of multiple keyword arguments.

import hashlib
from ulauncher.api import Extension, ExtensionResult
from ulauncher.api.shared.action.CopyToClipboardAction import CopyToClipboardAction

class Hash2(Extension):
    def on_input(self, input_text, trigger_id):
        # Show the algorithm specified as keyword, or all if the keyword was "hash"
        algorithms = hashlib.algorithms_guaranteed if trigger_id == 'hash' else [trigger_id]

        for algorithm in algorithms:
            try:
                seed = hashlib.new(algorithm)
                seed.update(input_text.encode())
                hash = seed.hexdigest()
                yield ExtensionResult(
                    name=hash,
                    description=algorithm,
                    on_enter=CopyToClipboardAction(hash),
                )
            except:
                pass

if __name__ == '__main__':
    Hash2().run()

We can also use the name "Ulauncher Hash" for the new repo since brpaz unpublished his original package and deleted the repo.

This is a good beginner example, but it would be good to add more examples to cover other parts of the API covering all the class methods for event binding in the class.

• [x] Move repo to Ulauncher organization and rename to drop the "2"
• [x] Publish the new link in ext.ulauncher.io
• [x] Unpublish the previous link
• [ ] Rewrite tutorial to show how to create Ulauncher Hash