fix: Resolve types with TypeScript 4.5

Our lovely TypeScript is finding every possible way to break things on every release.
I cannot find any documentation on "export maps" behavior, except these issues

microsoft/TypeScript#46860
microsoft/TypeScript#46334

package.json

@@ -3,7 +3,10 @@
 	"version": "5.4.0",
 	"description": "Core of AdonisJS",
 	"exports": {
-		".": "./build/providers/AppProvider.js",
+    ".": {
+      "types": "./build/adonis-typings/index.d.ts",
+      "require": "./build/providers/AppProvider.js"
+    },
 		"./standalone": "./build/standalone.js",
 		"./Ignitor": "./build/src/Ignitor/index.js",
 		"./commands": "./build/commands/index.js",