Landing page makeover

[RemDelaporteMathurin]

Description

Summary

Related Issues

Motivation and Context

Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 🔨 Code refactoring (no functional changes, no API changes)
• 📝 Documentation update
• ✅ Test update (adding missing tests or correcting existing tests)
• 🔧 Build/CI configuration change

Testing

• All existing tests pass locally (pytest)
• I have added new tests that prove my fix is effective or that my feature works

Code Quality Checklist

• My code follows the code style of this project (Ruff formatted: ruff format .)
• My code passes linting checks (ruff check .)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas

Documentation

• I have updated the documentation accordingly (if applicable)
• I have added docstrings to new functions/classes following the project conventions

Breaking Changes

Screenshots/Examples

Additional Notes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.10%. Comparing base (35b86fe) to head (5a1e04a).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1131      +/-   ##
==========================================
+ Coverage   94.90%   95.10%   +0.20%     
==========================================
  Files          44       44              
  Lines        3376     3619     +243     
==========================================
+ Hits         3204     3442     +238     
- Misses        172      177       +5     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[KulaginVladimir]

@RemDelaporteMathurin, Looks awesome!

Some optional suggestions:

1. In the carousel with FESTIM examples, Permeation through a multi-layer membrane does not look as visually impressive or as easy to understand as, for example, the monoblock simulations. The Tritium permeator probe example also seems a bit overcomplicated, with many small subfigures. The image could perhaps be simplified for the gallery.
2. I think the icons are too small. For example, the Python icon is barely distinguishable, although their size of course depends on whether they need to fit in a single row.
3. In dark mode, the text in the panels lacks contrast with the background, but it looks fine on hover.

[RemDelaporteMathurin]

@RemDelaporteMathurin, Looks awesome!

Some optional suggestions:

1. In the carousel with FESTIM examples, Permeation through a multi-layer membrane does not look as visually impressive or as easy to understand as, for example, the monoblock simulations. The Tritium permeator probe example also seems a bit overcomplicated, with many small subfigures. The image could perhaps be simplified for the gallery.
2. I think the icons are too small. For example, the Python icon is barely distinguishable, although their size of course depends on whether they need to fit in a single row.
3. In dark mode, the text in the panels lacks contrast with the background, but it looks fine on hover.

Thanks @KulaginVladimir I've updated the page based on your comments