feat: add project logo support and rename to Personal Projects

Changes:
- Created /static/images/projects/ folder for project logos
- Added ProjectLogo field to Project struct
- Updated cv-en.json and cv-es.json with projectLogo fields:
  - somosunaola.png for Somos Una Ola
  - herrumbre-vivo.png for Herrumbre Vivo Arte
- Updated template to display project logos with fallback to web icon
- Added CSS styling for project logo images (80×80px)
- Renamed section from "Projects" to "Personal Projects"

Logo images will display when PNG files are added to /static/images/projects/

internal/models/cv.go

@@ -101,6 +101,7 @@ type Language struct {
 type Project struct {
 	Title            string   `json:"title"`
 	URL              string   `json:"url"`
+	ProjectLogo      string   `json:"projectLogo,omitempty"` // Optional logo filename
 	Location         string   `json:"location"`
 	StartDate        string   `json:"startDate"`
 	Current          bool     `json:"current"`