chore(website): upgrade typescript eslint and parser manually

[wellwelwel]

Website

Step 1:

Upgrading both @typescript-eslint/parser and @typescript-eslint/eslint-plugin together.

Context:

• build(deps-dev): bump @typescript-eslint/eslint-plugin from 6.21.0 to 7.0.0 in /website #2439 (comment)

---

Step 2

Simplifying and improving the website test process by:

• Including performance through parallel tests.
• Improve output logs using assert instead of just throw it with process.exit(1).
• Using good practices renaming test files to .test.ts.

I used a personal package (poku) to assist me in test running and development.