Doc tweaks, populate extensions by-example, add Loader.add method #1600

	name: CI

	on:
	push:
	branches-ignore:
	- "dependabot/**"
	pull_request:

	jobs:
	lint:
	name: Lint
	runs-on: ubuntu-latest

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

	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: "3.10"

	- name: Run format checks
	run: \|
	pip install nox
	nox -s format_check

	type-check:
	name: Type-check
	runs-on: ubuntu-latest

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

	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: "3.10"

	- name: Run pyright
	run: \|
	pip install nox
	nox -s typecheck

	slotscheck:
	name: Slotscheck
	runs-on: ubuntu-latest

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

	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: "3.10"

	- name: Run slotscheck
	run: \|
	pip install nox
	nox -s slotscheck

	fragment-check:
	name: Fragment check
	runs-on: ubuntu-latest
	if: github.event_name == 'pull_request'

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

	- name: Check changelog fragment exists
	run: \|
	PR_NUMBER=${{ github.event.number }}

	if [ -n "$(compgen -G "fragments/${PR_NUMBER}.*.md")" ]; then
	echo "Fragment exists"
	exit 0
	fi

	echo "Fragment does not exist"
	exit 1

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