feat: Added documentation for Mirai theme data

docs/docs/design/_category_.json

@@ -0,0 +1,4 @@
+{
+  "label": "Design",
+  "position": 3
+}

docs/docs/design/input_decoration_theme.md

@@ -0,0 +1,5 @@
+---
+sidebar_position: 2
+---
+
+# InputDecorationTheme

docs/docs/design/theme.md

@@ -0,0 +1,88 @@
+---
+sidebar_position: 1
+---
+
+# Use themes to share colors and font styles
+
+Just like in Flutter themes are used to share colors and font styles, and app-wide themes is used the same way in Mirai with the help of `MiraiTheme.fromJson`.
+Simple `Theme` widgets are not supported in Mirai but can be expected in future releases.
+
+
+## Creating an app theme
+
+To share a Theme across an entire app, needs to create the particular theme first using `MiraiTheme.fromJson` and, then can be used across the app. Here is an example of creating light and dark themes from JSON.
+
+```dart
+
+// for light theme
+final Map<String, dynamic> lightThemeJsonData = {
+    "brightness": "light",
+    "disabledColor": "#60FEF7FF",
+    "colorScheme": {
+        "brightness": "light",
+        "primary": "#6750a4",
+        "onPrimary": "#FFFFFF",
+        "secondary": "#615B6F",
+        "onSecondary": "#FFFFFF",
+        "surface": "#FEFBFF",
+        "onSurface": "#1C1B1E",
+        "background": "#FEFBFF",
+        "onBackground": "#1C1B1E",
+        "surfaceVariant": "#E6E0EA",
+        "onSurfaceVariant": "#48454D",
+        "error": "#AB2D25",
+        "onError": "#FFFFFF",
+        "success": "#27BA62",
+        "onSuccess": "#FFFFFF"
+    }
+};
+
+final lightTheme = MiraiTheme.fromJson(lightThemeJsonData);
+
+// for dark theme 
+final Map<String, dynamic> darkThemeJsonData = {
+    "brightness": "dark",
+    "disabledColor": "#60FFFFFF",
+    "colorScheme": {
+        "brightness": "dark",
+        "primary": "#CCBDFA",
+        "onPrimary": "#341F6E",
+        "secondary": "#C9C2D9",
+        "onSecondary": "#322D40",
+        "surface": "#1C1B1E",
+        "onSurface": "#E5E1E6",
+        "background": "#1C1B1E",
+        "onBackground": "#E5E1E6",
+        "surfaceVariant": "#48454D",
+        "onSurfaceVariant": "#C9C4CE",
+        "error": "#F4B7AE",
+        "onError": "#600F0C",
+        "success": "#27BA62",
+        "onSuccess": "#FFFFFF"
+    }
+};
+
+final darkTheme = MiraiTheme.fromJson(darkThemeJsonData);
+
+```
+
+## Usage
+
+Mirai does not support themed widget like this in Flutter `Theme(child: Container())` hence app based themes can only be created using Mirai and for that we need to pass these to the MaterialApp constructor like this. 
+
+```dart
+
+return MiraiApp(
+    theme: state.lightTheme,
+    darkTheme: darkTheme,
+    themeMode: themeMode,
+    homeBuilder: (context) => const HomeScreen(),
+    title: 'Mirai Gallery',
+    routes: {
+        '/homeScreen': (context) => const HomeScreen(),
+        '/detailsScreen': (context) => const DetailsScreen(),
+    },
+);
+
+```
+

examples/mirai_gallery/pubspec.lock

@@ -189,10 +189,10 @@ packages:
     dependency: transitive
     description:
       name: dio
-      sha256: "347d56c26d63519552ef9a569f2a593dda99a81fdbdff13c584b7197cfe05059"
+      sha256: "3866d67f93523161b643187af65f5ac08bc991a5bcdaf41a2d587fe4ccb49993"
       url: "https://pub.dev"
     source: hosted
-    version: "5.1.2"
+    version: "5.3.0"
   fake_async:
     dependency: transitive
     description:
@@ -319,10 +319,10 @@ packages:
     dependency: "direct main"
     description:
       name: json_annotation
-      sha256: c33da08e136c3df0190bd5bbe51ae1df4a7d96e7954d1d7249fea2968a72d317
+      sha256: b10a7b2ff83d83c777edba3c6a0f97045ddadd56c944e1a23a3fdf43a1bf4467
       url: "https://pub.dev"
     source: hosted
-    version: "4.8.0"
+    version: "4.8.1"
   json_serializable:
     dependency: "direct dev"
     description:
@@ -343,10 +343,10 @@ packages:
     dependency: transitive
     description:
       name: logger
-      sha256: db2ff852ed77090ba9f62d3611e4208a3d11dfa35991a81ae724c113fcb3e3f7
+      sha256: "7ad7215c15420a102ec687bb320a7312afd449bac63bfb1c60d9787c27b9767f"
       url: "https://pub.dev"
     source: hosted
-    version: "1.3.0"
+    version: "1.4.0"
   logging:
     dependency: transitive
     description:
@@ -393,7 +393,7 @@ packages:
       path: "../../packages/mirai"
       relative: true
     source: path
-    version: "0.2.0"
+    version: "0.4.0"
   nested:
     dependency: transitive
     description:
@@ -593,4 +593,4 @@ packages:
     version: "3.1.1"
 sdks:
   dart: ">=3.0.0 <4.0.0"
-  flutter: ">=1.17.0"
+  flutter: ">=1.17.0"