Make Jpegli standalone, remove most part of libjxl code #1

	# Copyright (c) the JPEG XL Project Authors. All rights reserved.
	#
	# Use of this source code is governed by a BSD-style
	# license that can be found in the LICENSE file.

	# Workflow for building and running tests.

	name: Build/Test MD
	on:
	pull_request:
	types: [opened, reopened, labeled, unlabeled, synchronize]
	paths:
	- '**.md'

	permissions:
	contents: read

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name }}
	cancel-in-progress: ${{ github.event_name == 'pull_request' }}

	jobs:
	build_test:
	name: Ubuntu Build ${{ matrix.name }}
	if: ${{ !contains(github.event.pull_request.labels.*.name, 'CI:none') }}
	# Include all names of required jobs here
	strategy:
	matrix:
	include:
	- name: release
	- name: debug
	- name: scalar
	- name: asan
	- name: release-nojpeg
	- name: release-lcms2
	- name: release:gcc8
	runs-on: ubuntu-latest
	steps:
	- name: Harden Runner
	uses: step-security/harden-runner@63c24ba6bd7ba022e95695ff85de572c04a18142 # v2.7.0
	with:
	egress-policy: audit

	- run: 'echo "markdown only changes: no build required"'

	windows_msys:
	name: Windows MSYS2 / ${{ matrix.msystem }}
	if: ${{ !contains(github.event.pull_request.labels.*.name, 'CI:none') }}
	# Include all msystem of required jobs here
	strategy:
	matrix:
	include:
	- msystem: clang64
	- msystem: clang32
	runs-on: ubuntu-latest
	steps:
	- name: Harden Runner
	uses: step-security/harden-runner@63c24ba6bd7ba022e95695ff85de572c04a18142 # v2.7.0
	with:
	egress-policy: audit

	- run: 'echo "markdown only changes: no build required"'

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