update README to explain .sublime-syntax #1

	name: textmate
	on: push
	jobs:
	test:
	runs-on: macos-latest
	steps:
	- name: Install dependencies
	run: \|
	brew install --cask textmate
	brew install coreutils zig
	- name: Textmate load success
	run: \|
	# "install" bundle
	mkdir -p "$HOME/Library/Application Support/TextMate/Bundles/"
	ln -s "$PWD" "$HOME/Library/Application Support/TextMate/Bundles/Zig.tmbundle"

	# run TextMate, capture output
	/Applications/TextMate.app/Contents/MacOS/TextMate \| tee textmate.out &

	# don't expect the bundle to be mentioned in output as that would indicate an error
	! grep Zig.tmbundle textmate.out

	# open a sample source
	mate hello.zig

	# use Build command via keyboard shortcut
	osascript -e 'activate application "TextMate"' -e 'tell application "System Events" to keystroke "b" using command down'

	# wait for binary to be built
	gtimeout 30 /bin/sh -c 'while ! ls hello 2>/dev/null; do sleep 1; done'
	./hello

	# debugging
	# screencapture test.png; cat test.png \| base64

	osascript -e 'tell application "TextMate" to quit'

Provide feedback