implement saving image, sharing image, reading settings and chapters view

pubspec.lock

@@ -105,6 +105,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.3"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: "5fc22d7c25582e38ad9a8515372cd9a93834027aacf1801cf01164dac0ffa08c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.0"
   file_picker:
     dependency: "direct main"
     description:
@@ -113,6 +121,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "8.1.2"
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      sha256: "25517a4deb0c03aa0f32fd12db525856438902d9c16536311e76cdc57b31d7d1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -246,6 +262,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.12.0"
+  mime:
+    dependency: "direct main"
+    description:
+      name: mime
+      sha256: "801fd0b26f14a4a58ccb09d5892c3fbdeff209594300a542492cf13fba9d247a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.6"
   path:
     dependency: "direct main"
     description:
@@ -343,6 +367,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.1.9"
+  share_plus:
+    dependency: "direct main"
+    description:
+      name: share_plus
+      sha256: "468c43f285207c84bcabf5737f33b914ceb8eb38398b91e5e3ad1698d1b72a52"
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.0.2"
+  share_plus_platform_interface:
+    dependency: transitive
+    description:
+      name: share_plus_platform_interface
+      sha256: "6ababf341050edff57da8b6990f11f4e99eaba837865e2e6defe16d039619db5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.0.0"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -356,6 +396,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.10.0"
+  sprintf:
+    dependency: transitive
+    description:
+      name: sprintf
+      sha256: "1fc9ffe69d4df602376b52949af107d8f5703b77cda567c4d7d86a0693120f23"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.0"
   sqlite3:
     dependency: "direct main"
     description:
@@ -484,6 +532,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.1.2"
+  uuid:
+    dependency: transitive
+    description:
+      name: uuid
+      sha256: a5be9ef6618a7ac1e964353ef476418026db906c4facdedaa299b7a2e71690ff
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.5.1"
   vector_math:
     dependency: transitive
     description: