Migrate Traefik Proxy dashboard UI to React

.github/workflows/template-webui.yaml

.github/workflows/test-conformance.yaml

.github/workflows/test-integration.yaml

.github/workflows/test-unit.yaml

.github/workflows/validate.yaml

Makefile

docs/content/assets/img/webui-dashboard.png

webui/.dockerignore

webui/.editorconfig

webui/.env.sample

webui/.eslintignore

webui/.eslintrc.cjs

webui/.gitignore

webui/.nvmrc

webui/.postcssrc.cjs

webui/.prettierrc.json

webui/.stylintrc

webui/.yarnrc.yml

webui/babel.config.cjs

webui/buildx.Dockerfile