docs: add and improve examples of connections, queries and more #913

Job	Run time
cleanup	17s
Node.js 16.x - DB mysql:8.0.18 - SSL=0 Compression=0	1m 3s
Node.js 16.x - DB mysql:8.0.22 - SSL=0 Compression=0	1m 8s
Node.js 16.x - DB mysql:8.0.33 - SSL=0 Compression=0	1m 14s
Node.js 16.x - DB mysql:5.7 - SSL=0 Compression=0	1m 10s
Node.js 18.x - DB mysql:8.0.18 - SSL=0 Compression=0	1m 5s
Node.js 18.x - DB mysql:8.0.22 - SSL=0 Compression=0	1m 7s
Node.js 18.x - DB mysql:8.0.33 - SSL=0 Compression=0	1m 7s
Node.js 18.x - DB mysql:5.7 - SSL=0 Compression=0	1m 5s
Node.js 20.x - DB mysql:8.0.18 - SSL=0 Compression=0	1m 5s
Node.js 20.x - DB mysql:8.0.22 - SSL=0 Compression=0	1m 6s
Node.js 20.x - DB mysql:8.0.33 - SSL=0 Compression=0	1m 7s
Node.js 20.x - DB mysql:5.7 - SSL=0 Compression=0	1m 4s
Node.js 20.x - DB mysql:8.0.33 - SSL=0 Compression=1	1m 7s
Node.js 20.x - DB mysql:8.0.33 - SSL=1 Compression=0	1m 26s
Node.js 16.x - DB mysql:8.0.18 - SSL=0 Compression=1	1m 3s
Node.js 16.x - DB mysql:8.0.18 - SSL=1 Compression=0	1m 4s
Node.js 16.x - DB mysql:8.0.18 - SSL=1 Compression=1	1m 7s
Node.js 14.x - DB mysql:5.7 - SSL=0 Compression=0	1m 7s
Node.js 16.x - DB datagrip/mysql:5.1 - SSL=0 Compression=0	25s
coverage	22s
	21m 19s

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