Added basic swim demo from work performed by pietru2004. #633

	# Workflow to automatically lint gdscript code
	name: gdlint on push

	on:
	[push, pull_request]

	jobs:
	gdlint:
	name: gdlint scripts
	runs-on: ubuntu-latest

	steps:
	# Check out the repository
	- name: Checkout
	uses: actions/checkout@v4

	# Ensure python is installed
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.10'

	# Install gdtoolkit
	- name: Install Dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install 'gdtoolkit==4.*'

	# Lint the godot-xr-tools addon
	- name: Lint Godot XR Tools
	run: \|
	gdlint addons/godot-xr-tools

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