wip: migrate to typescript

tsconfig.json

@@ -0,0 +1,24 @@
+{
+	"compilerOptions": {
+		"target": "ESNext",
+		"useDefineForClassFields": true,
+		"lib": ["ESNext", "ES2020", "DOM", "DOM.Iterable"],
+		"module": "ESNext",
+		"skipLibCheck": true,
+		"moduleResolution": "bundler",
+		"allowImportingTsExtensions": true,
+		"resolveJsonModule": true,
+		"isolatedModules": true,
+		"noEmit": true,
+		"jsx": "react-jsx",
+		"strict": true,
+		"noUnusedLocals": true,
+		"noImplicitAny": false,
+		"noUnusedParameters": true,
+		"noFallthroughCasesInSwitch": true,
+		"paths": {
+			"*": ["./extension/*.d.ts"]
+		}
+	},
+	"include": ["extension"]
+}