Suggest valid project names on InvalidProjectName #8252

Job	Run time
rustfmt	7s
test (stable, x86_64-unknown-linux-gnu)	3m 29s
test-wasm	1m 28s
lint-build	1m 7s
test (stable, x86_64-unknown-linux-musl)	6m 7s
validate	10s
test (stable, aarch64-unknown-linux-gnu)	1m 57s
test (stable, aarch64-unknown-linux-musl)	2m 26s
test (stable, x86_64-apple-darwin)	9m 19s
test (stable, x86_64-pc-windows-msvc)	6m 15s
test (stable, aarch64-apple-darwin, macos-latest, arm64, false, true)	3m 50s
test-projects	1m 40s
	37m 55s

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