Add TypeScript build config for .d.ts declaration output

Set up tsconfig.json (declaration: true, DOM lib), package.json with
main/types/files pointing at dist, and .gitignore for node_modules/dist
so the library can be consumed with type declarations.

package.json

@@ -0,0 +1,22 @@
+{
+  "name": "abstract-ts-table",
+  "version": "1.0.0",
+  "description": "A utility class for creating HTML tables.",
+  "type": "module",
+  "main": "dist/abstract-table.js",
+  "types": "dist/abstract-table.d.ts",
+  "files": ["dist"],
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "build": "tsc"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://git.centremetre.com/CentreMetre/abstract-ts-table"
+  },
+  "author": "CentreMetre",
+  "license": "MIT",
+  "devDependencies": {
+    "typescript": "^6.0.3"
+  }
+}