Add localization (DE/EN), vertical-scroll month view, context menus, custom colors

- Vertical-scroll month view with multi-day event spans, zig-zag month
  divider, CW number per week, on-demand event loading while scrolling
- Top bar redesign: icon-only view picker on right, month title centered
- Long-press context menus on day cells (month) and hour slots (week/day)
  for "New event", "Open in week view", "Open in day view", "Open in month view"
- Localization system with system/de/en switch covering top bar, view picker,
  settings, menu, profile, server, accounts, event editor, agenda
- Three new color pickers (text/background/line) + today-marker color
  applied in calendar views; current-time line now uses today color
- App icon: removed alpha channel, accent color set to icon green (#20A050)
- TestFlight: ITSAppUsesNonExemptEncryption=NO baked into Info.plist keys

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Calendarr iOS.xcodeproj/xcuserdata/scarriffle.xcuserdatad/xcschemes/xcschememanagement.plist

@@ -10,5 +10,18 @@
 			<integer>0</integer>
 		</dict>
 	</dict>
+	<key>SuppressBuildableAutocreation</key>
+	<dict>
+		<key>3927C7BB2FB99D0E00EAD8ED</key>
+		<dict>
+			<key>primary</key>
+			<true/>
+		</dict>
+		<key>C0000A01FB4E10100AB5001</key>
+		<dict>
+			<key>primary</key>
+			<true/>
+		</dict>
+	</dict>
 </dict>
 </plist>