Simplify Landing Page Text

[groundcat]

Aims to enhance the mobile experience of the search engine front end by simplifying the landing page text, especially for mobile users.

The current text contains unnecessary information that can be removed to create a cleaner and more concise interface.

Changes Made:

• Condensed the description of the search engine to "A free, open-source and non-profit search engine"
• Removed the instruction to "start searching by using the search bar above" as it is self-explanatory

This PR is related to a comment from the HN post.

[ColinEspinas]

Hey @groundcat, thanks for the MR,

I like this, @daoudclarke what do you think?

[daoudclarke]

Looks good to me! Thanks all