Update main README reference to Katacoda, remove all others. #707

	name: Continuous Integration (CI)

	on:
	push:

	pull_request:
	branches: [ develop ]

	jobs:
	build:
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-20.04, windows-latest]
	variant: [esp8266, host, rp2040]
	include:
	- variant: esp8266
	arch: Esp8266
	- variant: host
	arch: Host
	- variant: rp2040
	arch: Rp2040

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}-${{ toJson(matrix) }}
	cancel-in-progress: true

	runs-on: ${{ matrix.os }}

	env:
	SMING_ARCH: ${{ matrix.arch }}
	SMING_SOC: ${{ matrix.variant }}

	steps:
	- name: Fix autocrlf setting
	run: \|
	git config --global --add core.autocrlf input

	- name: Checkout code
	uses: actions/checkout@v3

	- name: Configure environment
	shell: pwsh
	run: \|
	"CI_BUILD_DIR=" + (Resolve-Path ".").path >> $env:GITHUB_ENV
	"SMING_HOME=" + (Resolve-Path "Sming").path >> $env:GITHUB_ENV

	- name: Install build tools for Ubuntu
	if: ${{ matrix.os == 'ubuntu-20.04' }}
	run: \|
	Tools/ci/install.sh

	- name: Install build tools for Windows
	if: ${{ matrix.os == 'windows-latest' }}
	run: \|
	. Tools/ci/setenv.ps1
	Tools/ci/install.cmd

	- name: Build and test for ${{matrix.variant}} on Ubuntu
	env:
	CLANG_FORMAT: clang-format-8
	if: ${{ matrix.os == 'ubuntu-20.04' }}
	run: \|
	source $SMING_HOME/../Tools/export.sh
	$CLANG_FORMAT --version
	Tools/ci/build.sh

	- name: Build and test for ${{matrix.variant}} on Windows
	if: ${{ matrix.os == 'windows-latest' }}
	run: \|
	. Tools/ci/setenv.ps1
	Tools/ci/build.cmd

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