Revert "build: remove unused tsconfig.json"

This reverts commit a970809.

Author: coderbyheart

tsconfig.json

@@ -0,0 +1,18 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "target": "es2019",
+    "lib": ["es2019"],
+    "strict": true,
+    "declaration": true,
+    "skipLibCheck": true,
+    "noUnusedParameters": true,
+    "noUnusedLocals": true,
+    "noImplicitThis": true,
+    "noImplicitReturns": true,
+    "removeComments": true,
+    "noFallthroughCasesInSwitch": true,
+    "forceConsistentCasingInFileNames": true,
+    "noImplicitAny": true
+  }
+}