Start writing the web app

Signed-off-by: Nikolai Rodionov <allanger@posteo.com>

lib/shared/ui/colors/dark_mode.dart

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+import 'package:flutter/material.dart';
+
+class DarkModeColors {
+  static const darkBackground = Color(0xFF121212);
+  static const darkSurface = Color(0xFF1E1E1E);
+  static const darkPrimary = Color(0xFF8B7CFF);
+  static const darkText = Color(0xFFEDEDED);
+}

lib/shared/ui/colors/light_mode.dart

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+import 'package:flutter/material.dart';
+
+class LightModeColors {
+  // Light theme
+  static const backgroundPrimary = Color(0xFFF6F7F9);
+  static const backgroundElevated = Color(0xFFEEF0F3);
+  static const lightSurface = Color(0xFFF5F5F5);
+  static const lightPrimary = Color(0xFF6C5CE7);
+  static const lightText = Color(0xFF1A1A1A);
+
+  // Inputs
+  static const inputBackground = Color(0xFFFFFFFF);
+  static const inputDefaultBorder = Color(0xFFD9D9D9);
+  static const inputFocusedBorder = Color(0xFFEFFF1A);
+
+  // Text
+  static const textPrimary = Color(0xFF14161A);
+
+  // Buttons
+  static const buttonPrimary = Color(0xFFEFFF1A);
+}