Add przychodnie page listing 5 medical clinics

[plutamikolaj]

Description

This PR adds a new page at /przychodnie that displays a list of 5 mocked medical clinics with their addresses and opening hours.

Changes

• Created new route /przychodnie with TanStack Router
• Added "Przychodnie" navigation link to the header
• Implemented responsive card layout for clinic listings
• Each clinic displays:
  • Name
  • Full address (street, postal code, city)
  • Opening hours for weekdays, Saturday, and Sunday
  • Icons for location and time (using lucide-react)

Mocked Data

The page includes 5 medical clinics from different Polish cities:

1. Przychodnia Medyczna Centrum (Warszawa)
2. Przychodnia Rodzinna Zdrowie (Wrocław)
3. Centrum Medyczne Vita (Kraków)
4. Przychodnia Specjalistyczna Medyk (Łódź)
5. Przychodnia Lekarska Premium (Gdańsk)

Testing

Tested locally at http://localhost:3001/przychodnie - all clinics display correctly with proper formatting and responsive layout.

Screenshots

Home page with new navigation link:
Home page with Przychodnie link

Przychodnie page showing all 5 clinics:
Przychodnie page with all clinics

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