Fix issue where and keyword is wrongly used to determine quantity + new demo website

[jlucaspains]

This pull request includes significant changes to the project structure and configuration, primarily focusing on replacing the demo directory with demo2 and updating related configurations accordingly. Additionally, it involves the removal of various configuration files and dependencies.

Fixes #171

Project Structure and Configuration Updates:

• .github/workflows/demo.yml: Updated paths and commands to reflect the renaming of the demo directory to demo2, including switching from npm to yarn for dependency management and build processes. [1] [2]

Removal of old demo files

• Deleted several configuration files related to ESLint, Prettier, and project setup, including .eslintignore, .eslintrc.cjs, .npmrc, .prettierignore, .prettierrc, README.md, package.json, app.html, +layout.svelte, +page.js, +page.svelte, styles.css, robots.txt, svelte.config.js, and vite.config.js in the demo directory. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15]

Updates to .gitignore and .npmrc:

• demo2/.gitignore: Renamed from demo/.gitignore and updated to include additional output directories and environment files.
• demo2/.npmrc: Added engine-strict=true to enforce strict engine compatibility.

Updates to .prettierignore:

• demo2/.prettierignore: Added entries to ignore lock files for various package managers.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud