Add explanation about boolean configurations in env/fs (#2925) #827

Job	Run time
changed_files	50s
towncrier_check	45s
check_if_release_branch	1s
build mirrord CLI	0s
lint	4m 13s
test_agent_image	6m 3s
test_agent	3m 10s
check-rust-docs	4m 47s
integration_tests	12m 52s
test_cli_image	15m 46s
lint_markdown	0s
macos_tests	25m 0s
e2e (docker)	11m 4s
vscode_e2e_on_release_branch	0s
intellij_e2e_on_release_branch	0s
e2e (containerd)	10m 54s
ci	1s
	1h 35m 26s

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