chore: refactor cargo manifests and add rusqlite_migration_tokio_asyn… #546

Job	Run time
Test all features	44s
Check	10s
Clippy	34s
Documentation	11s
Code coverage	2m 13s
Rustfmt	11s
Check with minimal Rust version	49s
Mutation tests	1m 12s
Test feature async-tokio-rusqlite	43s
Test examples	39s
Test feature from-directory	52s
Test no features	39s
	8m 57s

Provide feedback