Update content & design (#75)

Reviewed-on: https://home.schmelczer.dev/git/git/andras/schmelczer-dev/pulls/75

src/content/projects/fizika.md

@@ -0,0 +1,17 @@
+---
+title: Fizika
+description: 'I needed it for my own physics érettségi: 659 past-paper questions, jQuery, localStorage, no accounts. Eight years on, students still find it.'
+thumbnail:
+  src: ./_assets/fizika.jpg
+  alt: Screenshot of the Fizika practice app showing topic-selection buttons.
+period: '2017-2018'
+sortDate: 2018-05-01
+technologies: ['jQuery', 'HTML/CSS', 'Node/Express', 'JSON', 'localStorage']
+selected: false
+essay: fizika-erettsegi-practice-app
+links:
+  - label: Live
+    url: https://fizika.schmelczer.dev
+  - label: Source
+    url: https://home.schmelczer.dev/git/andras/fizika
+---