feat: add basic type checking

tsconfig.json

@@ -0,0 +1,17 @@
+{
+	"compilerOptions": {
+		"target": "ES2022",
+		"module": "ESNext",
+		"moduleResolution": "NodeNext",
+		"lib": ["es2017", "dom"],
+		"allowJs": true,
+		"checkJs": true,
+		"noEmit": true,
+		"strict": false,
+		"noImplicitThis": true,
+		"alwaysStrict": true,
+		"esModuleInterop": true,
+		"resolveJsonModule": true
+	},
+	"include": ["test", "src"]
+}