Add "no results" component

[MathyouMB]

As a user searching or filtering projects, I want to see a clear message when no results match my query so that I understand the system is working and I should try different filters or keywords.

---

🧠 Context

Right now, when no projects match the user’s search or selected tags, the project list simply renders empty — with no feedback to the user. This can feel like a bug or confusing silence.

We should create a dedicated NoResults component to render when the project search returns zero results. This will improve usability and make the interface feel more polished.

Something kinda like:

---

🛠️ Implementation Plan

1. Create a new component

   • File: components/NoResults.tsx

   • Display a friendly message like:

     No projects found. Try adjusting your search or removing some filters.

   • Optionally include:

     • A reset filters button (if applicable)
     • A fun emoji or graphic

2. Update the Search component

   • After the project fetch, if projects.length === 0, render <NoResults /> in place of the project list

3. Style it appropriately

   • Use existing spacing and typography tokens
   • Ensure it looks good in both light and dark mode

---

✅ Acceptance Criteria

• A NoResults component exists and is displayed when projects.length === 0
• The message appears below the search input and tag list