Split codec into @polkadot/types-codec (#4329)

* Split codec into @polkadot/types-codec

* Additional (test cleanups next)

* Fix tests

* Imports from '@polkadot/types-codec

* All remaining codec imports (only exports left)

* Bytes -> types-codec

* Cleanups

* Bool, BitVec, Text movements

* sanitize move

* Adjust (first build fixes)

* Adjust

* Additional

* Adjust

* Adjustments

* linting

* Adjust, not working atm

* Move {U,I}{8,16,32...} to types-codec

* createTypeUnsafe

* Fix type-only exports

* Folder exports

* Split Lookup/Create on registry interfaces

* Clanup LookupRegistry & CreateRegistry

* Combine CreateRegistry into LookupRegistry

tsconfig.base.json

@@ -16,6 +16,8 @@
       "@polkadot/rpc-provider/*": ["rpc-provider/src/*"],
       "@polkadot/types": ["types/src"],
       "@polkadot/types/*": ["types/src/*"],
+      "@polkadot/types-codec": ["types-codec/src"],
+      "@polkadot/types-codec/*": ["types-codec/src/*"],
       "@polkadot/types-known": ["types-known/src"],
       "@polkadot/types-known/*": ["types-known/src/*"],
       "@polkadot/types-support": ["types-support/src"],