Backporting from effect/*

The following features can be backported without breaking changes:

2.14

• flatMap (aka chain / chainW) https://github.com/gcanti/fp-ts/pull/1849

2.15

• flatMap* (aka chain*K / chain*KW) https://github.com/gcanti/fp-ts/pull/1862
• tap (aka chainFirst / chainFirstW) https://github.com/gcanti/fp-ts/pull/1857
• tapError (aka orElseFirst / orElseFirstW) https://github.com/gcanti/fp-ts/pull/1858
• LazyArg (aka Lazy) https://github.com/gcanti/fp-ts/pull/1856

2.16

• tapEither (dual) (aka chainFirstEitherK / chainFirstEitherKW) https://github.com/gcanti/fp-ts/pull/1864
• tapIO (dual) (aka chainFirstIOK) https://github.com/gcanti/fp-ts/pull/1865
• as / asUnit https://github.com/gcanti/fp-ts/pull/1867
• tapTask (dual) (aka chainFirstTaskK) https://github.com/gcanti/fp-ts/pull/1869
• mapError (dual) (aka mapLeft) https://github.com/gcanti/fp-ts/pull/1870
• mapBoth (dual) (aka bimap) https://github.com/gcanti/fp-ts/pull/1872
• tapReader (dual) (aka chainFirstReaderK / chainFirstIReaderKW) https://github.com/gcanti/fp-ts/pull/1871
• tapReaderEither (dual) (aka chainFirstReaderEitherK / chainFirstEitherKW) https://github.com/gcanti/fp-ts/pull/1873
• tapReaderIO (dual) (aka chainFirstReaderIOK) https://github.com/gcanti/fp-ts/pull/1873
• tapReaderTask (dual) (aka chainFirstReaderTaskK) https://github.com/gcanti/fp-ts/pull/1873
• tapTaskEither (dual) (aka chainFirstTaskEitherK / chainFirstTaskEitherKW) https://github.com/gcanti/fp-ts/pull/1873
• flatMapReaderTask (dual) (aka chainReaderTaskK / chainReaderTaskKW) https://github.com/gcanti/fp-ts/pull/1874
• flatMapTaskEither (dual) (aka chainTaskEitherK / chainTaskEitherKW) https://github.com/gcanti/fp-ts/pull/1874
• flatMapIO (dual) (aka chainIOK) https://github.com/gcanti/fp-ts/pull/1874
• Option.orElse (dual) (aka alt / altW) https://github.com/gcanti/fp-ts/pull/1868
• flatMapTask (dual) (aka chainTaskK) https://github.com/gcanti/fp-ts/pull/1876
• flatMapReader (dual) (aka chainReaderK / chainReaderKW) https://github.com/gcanti/fp-ts/pull/1876
• flatMapReaderIO (dual) (aka chainReaderIOK / chainReaderIOKW) https://github.com/gcanti/fp-ts/pull/1879
• flatMap* (aka chain*K / chain*KW) https://github.com/gcanti/fp-ts/pull/1880

2.17

• asUnit -> asVoid

TODO (Feel free to add a comment to this issue if you want to suggest any other backporting)

• ???