chore: skip lib check and add tsconfig schema ref

- enable skipLibCheck (recommended by TSC)

- disable stripInternal (no use)

- add tsconfig schema for auto-completion in IDE

tsconfig-base.jsonc

@@ -1,4 +1,5 @@
 {
+  "$schema": "https://json.schemastore.org/tsconfig",
   "compilerOptions": {
     // https://node.green/#ES2020
     // https://kangax.github.io/compat-table/es2016plus
@@ -12,11 +13,11 @@
 
     "noEmit": true,
     "sourceMap": true,
-    "stripInternal": true,
 
     "esModuleInterop": true,
     "isolatedModules": true,
     "resolveJsonModule": true,
+    "skipLibCheck": true,
     "verbatimModuleSyntax": true,
 
     "allowUnreachableCode": false,