[Chemaclass]

Background

The homepage lacked a runnable example, and the quickstart used install.sh commands after npm installation. The guides now show a complete test and the command for each install method.

Changes

• Add a Bash function, test, command and expected output to the homepage.
• Match quickstart commands to install.sh, project npm and global npm installs.
• Improve button text contrast, respect reduced motion and link testing recipes from the sidebar.
• Validate the docs build, desktop and mobile layouts, reduced motion and formatting.

Checklist

• I updated the CHANGELOG.md to reflect the new feature or fix
• I updated the documentation to reflect the changes