doc: Add design documentation for Istio support in kusion #908

	# Reference from:
	# https://github.com/c-bata/go-prompt/blob/master/.github/workflows/test.yml
	name: Test
	on:
	pull_request:
	branches:
	- main
	push:
	branches:
	- main
	jobs:
	Test:
	name: Unit tests with coverage
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	with:
	fetch-depth: 0
	- name: Set up Go 1.19
	uses: actions/setup-go@v2
	with:
	go-version: 1.19

	- run: go build ./...
	- run: go vet ./...

	- name: Running go tests with coverage
	env:
	GO111MODULE: on
	run: make cover
	- name: Send coverage
	uses: shogo82148/actions-goveralls@v1
	with:
	path-to-profile: coverage.out
	Lint:
	name: Lint checks
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	with:
	fetch-depth: 0
	- name: Set up Go 1.19
	uses: actions/setup-go@v2
	with:
	go-version: 1.19
	- name: golangci-lint
	uses: golangci/golangci-lint-action@v3
	with:
	# Optional: version of golangci-lint to use in form of v1.2 or v1.2.3 or `latest` to use the latest version
	version: v1.52.2

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