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.json

@@ -12,6 +12,7 @@
     { "path": "./packages/rpc-provider" },
     { "path": "./packages/typegen" },
     { "path": "./packages/types" },
+    { "path": "./packages/types-codec" },
     { "path": "./packages/types-known" },
     { "path": "./packages/types-support" }
   ]