TypeScript update to 6.0.3 (#3806)

## Description:

Updating TypeScript to 6.0.3.
Updating TypeScript-eslint to 8.59.1 for TS6 support.
Concurrently needed to get updated as well to remove deprecated warning.

Most things deleted are now just defaults.

## Please complete the following:

- [X] I have added screenshots for all UI updates
- [X] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [X] I have added relevant tests to the test directory
- [X] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

Babyboucher

package.json

@@ -36,6 +36,7 @@
     "@types/benchmark": "^2.1.5",
     "@types/chai": "^4.3.17",
     "@types/d3": "^7.4.3",
+    "@types/ejs": "^3.1.5",
     "@types/express": "^5.0.6",
     "@types/google-protobuf": "^3.15.12",
     "@types/hammerjs": "^2.0.46",
@@ -55,7 +56,7 @@
     "benchmark": "^2.1.4",
     "canvas": "^3.2.1",
     "chai": "^5.1.1",
-    "concurrently": "^8.2.2",
+    "concurrently": "^9.2.1",
     "cross-env": "^7.0.3",
     "d3": "^7.9.0",
     "eslint": "^9.21.0",
@@ -79,8 +80,8 @@
     "sinon-chai": "^4.0.0",
     "tailwindcss": "^4.1.18",
     "tsconfig-paths": "^4.2.0",
-    "typescript": "^5.7.2",
-    "typescript-eslint": "^8.26.0",
+    "typescript": "^6.0.3",
+    "typescript-eslint": "^8.59.1",
     "vite": "^7.3.2",
     "vite-plugin-html": "^3.2.2",
     "vite-plugin-static-copy": "^3.1.4",