Move backends (and examples) into separate subpackages #215

	name: Build Linux

	on:
	push:
	pull_request:
	branches: [ main ]

	jobs:
	build-linux:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3
	- name: Install Dependencies
	run: \|
	sudo apt update && \
	sudo apt install -y libgtk-4-dev clang
	- name: Build
	run: \|
	swift build --target SwiftCrossUI && \
	cd Backends/GtkBackend && \
	swift build --target GtkBackend && \
	swift build --target GtkCodeGen && \
	swift build --target GtkExample && \
	cd ../../Examples && \
	swift build --target CounterExample && \
	swift build --target RandomNumberGeneratorExample && \
	swift build --target GreetingGeneratorExample && \
	swift build --target SplitExample && \
	swift build --target ControlsExample && \
	swift build --target WindowingExample && \
	swift build --target NavigationExample && \
	swift build --target SpreadsheetExample && \
	swift build --target StressTestExample
	- name: Test
	run: swift test

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