Add controls container for turbo mode indicator

src/components/controls/controls.css

src/components/controls/controls.jsx

src/components/green-flag/green-flag.css

src/components/green-flag/icon-green-flag.svg

src/components/gui/gui.css

src/components/gui/gui.jsx

src/components/stop-all/stop-all.css

src/components/turbo-mode/icon--turbo.svg

src/components/turbo-mode/turbo-mode.css

src/components/turbo-mode/turbo-mode.jsx

src/containers/controls.jsx

src/containers/green-flag.jsx

src/css/colors.css

src/examples/blocks-only.css

src/examples/blocks-only.jsx

src/examples/player.jsx

test/unit/components/controls.test.jsx