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

packages/types-codec/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "baseUrl": "..",
+    "outDir": "./build",
+    "rootDir": "./src",
+    "resolveJsonModule": true
+  },
+  "references": []
+}