refactor(core): port core to typescript

@commitlint/core/package.json

@@ -2,8 +2,10 @@
   "name": "@commitlint/core",
   "version": "8.3.5",
   "description": "Lint your commit messages",
+  "main": "lib/core.js",
+  "types": "lib/core.d.ts",
   "files": [
-    "index.js"
+    "lib/"
   ],
   "scripts": {
     "deps": "dep-check",

@commitlint/core/src/core.ts

@@ -0,0 +1,11 @@
+import format from '@commitlint/format';
+import load from '@commitlint/load';
+import lint from '@commitlint/lint';
+import read from '@commitlint/read';
+
+export = {
+	format,
+	load,
+	lint,
+	read
+};

@commitlint/core/tsconfig.json

@@ -0,0 +1,10 @@
+{
+    "extends": "../../tsconfig.shared.json",
+    "compilerOptions": {
+        "composite": true,
+        "rootDir": "./src",
+        "outDir": "./lib"
+    },
+    "include": ["./src/**/*.ts"],
+    "exclude": ["./src/**/*.test.ts", "./lib/**/*"]
+}

tsconfig.json

@@ -17,5 +17,6 @@
         { "path": "@commitlint/read" },
         { "path": "@commitlint/rules" },
         { "path": "@commitlint/lint" },
+        { "path": "@commitlint/core" },
     ]
 }