feat(`ci`): add & enable ci/cd #4

Job	Run time
fmt	19s
clippy	44s
feature checks	1m 55s
docs	31s
test no default features (ubuntu-latest)	2m 57s
test default features (ubuntu-latest)	3m 48s
test all features (ubuntu-latest)	4m 16s
test no default features (macos-latest)	5m 32s
test default features (macos-latest)	4m 27s
test all features (macos-latest)	5m 20s
test no default features (windows-latest)	6m 8s
test default features (windows-latest)	7m 14s
test all features (windows-latest)	11m 38s
	54m 49s

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