chore(examples): simplify all examples #3317

Job	Run time
clippy	39s
check (ubuntu-latest, 1.74.0)	40s
check (ubuntu-latest, stable)	39s
coverage	1m 8s
check (windows-latest, 1.74.0)	2m 10s
lint	56s
check (windows-latest, stable)	2m 7s
check (macos-latest, 1.74.0)	1m 6s
check (macos-latest, stable)	50s
test (ubuntu-latest, 1.74.0, crossterm)	1m 9s
test-doc (ubuntu-latest)	2m 38s
test (ubuntu-latest, 1.74.0, termion)	1m 11s
test-doc (windows-latest)	3m 32s
test (ubuntu-latest, 1.74.0, termwiz)	1m 53s
test-doc (macos-latest)	1m 6s
test (ubuntu-latest, stable, crossterm)	1m 2s
test (ubuntu-latest, stable, termion)	1m 4s
test (ubuntu-latest, stable, termwiz)	1m 31s
test (windows-latest, 1.74.0, crossterm)	3m 59s
test (windows-latest, 1.74.0, termwiz)	4m 50s
test (windows-latest, stable, crossterm)	2m 49s
test (windows-latest, stable, termwiz)	3m 26s
test (macos-latest, 1.74.0, crossterm)	1m 15s
test (macos-latest, 1.74.0, termion)	1m 19s
test (macos-latest, 1.74.0, termwiz)	1m 38s
test (macos-latest, stable, crossterm)	1m 28s
test (macos-latest, stable, termion)	1m 3s
test (macos-latest, stable, termwiz)	1m 49s
	48m 57s

Provide feedback