CI/CD + release packaging: green badges, checks, and offline demo mode #1

	name: CI

	on:
	push:
	branches: [main]
	pull_request:

	permissions:
	contents: read

	jobs:
	ci:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.12"]

	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	cache: pip

	- name: Install (editable + dev extras)
	run: \|
	python -m pip install --upgrade pip
	python -m pip install -e ".[dev]"

	- name: Ruff (lint)
	run: \|
	python -m ruff check .

	- name: Ruff (format check)
	run: \|
	python -m ruff format --check .

	- name: Mypy
	run: \|
	python -m mypy src/rune_companion

	- name: Pytest
	run: \|
	python -m pytest

	- name: Build dist (sdist/wheel)
	run: \|
	python -m pip install --upgrade build twine
	python -m build
	python -m twine check dist/*

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