Improve beginner experience with courses #3180

Job	Run time
Bench (ubuntu-latest)	2m 5s
Examples (ubuntu-latest)	16m 7s
Bench (macos-latest)	8m 1s
ROS2 Bridge Examples	11m 57s
Examples (macos-latest)	10m 26s
Bench (windows-latest)	14m 59s
Examples (windows-latest)	16m 49s
Test (ubuntu-latest)	3m 8s
Test (macos-latest)	2m 37s
License Checks	53s
CLI Test (ubuntu-latest)	6m 50s
Test (windows-latest)	8m 53s
CLI Test (macos-latest)	4m 27s
Clippy	2m 49s
CLI Test (windows-latest)	12m 16s
cross-check (ubuntu-20.04, x86_64-unknown-linux-gnu)	3m 25s
cross-check (ubuntu-20.04, i686-unknown-linux-gnu)	3m 17s
Formatting	15s
Typos	23s
cross-check (ubuntu-20.04, aarch64-unknown-linux-gnu)	4m 18s
cross-check (ubuntu-20.04, aarch64-unknown-linux-musl)	3m 17s
cross-check (ubuntu-20.04, armv7-unknown-linux-musleabihf)	2m 56s
cross-check (macos-12, aarch64-apple-darwin)	4m 2s
cross-check (macos-12, x86_64-apple-darwin)	3m 52s
	2h 28m 2s

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