Update WIT definitions, add tests & CI infra #2

	name: Python CI

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.12'
	- name: Install uv
	run: pip install uv
	- name: Install dependencies
	run: uv sync
	- name: Install viceroy
	run: \|
	curl -L https://github.com/fastly/Viceroy/releases/download/v0.14.2/viceroy_v0.14.2_linux-amd64.tar.gz \| tar -xz
	sudo mv viceroy /usr/local/bin/
	- name: Build WebAssembly component
	run: make app.wasm
	- name: Install dependencies
	run: uv sync --extra dev --extra test
	- name: Check formatting
	run: make format-check
	- name: Run linting
	run: make lint
	- name: Run tests
	run: make test

Provide feedback