Enhance Brag Document with Filtering and Styling Improvements

- Added CSS styles for project cards and filter buttons to improve visual hierarchy and usability.
- Implemented a sticky filter wrapper for better accessibility and user experience.
- Introduced impact filters for projects and open-source contributions, allowing users to filter by impact type.
- Enhanced JavaScript functionality to dynamically filter project cards based on selected impact and tags.
- Updated the structure of the brag document to include year separators for better organization of projects.
- Refactored existing JavaScript to streamline filtering logic and improve performance.
- Added new Ruby scripts to automate impact type assignment and tag mapping for projects and talks.
- Improved overall layout and responsiveness of the brag document.

Author: SebastienDegodez

.gitignore

@@ -10,6 +10,13 @@
 *.userosscache
 *.sln.docstates
 
+# Jekyll generated files
+_site/
+.sass-cache/
+.jekyll-cache
+.jekyll-metadata/
+vendor/
+
 # User-specific files (MonoDevelop/Xamarin Studio)
 *.userprefs
 
@@ -410,3 +417,4 @@ apm_modules/
 
 # Design exploration / previews
 .ecc-design/
+.jekyll-cache/Jekyll/Cache/Jekyll--Converters--Markdown/8f/50f7b44d22be4ad870591e2743af4a7f081f41ac3ea8b187fd9b740fc6948f