added pinput package for better ux of enter otp and added back button in otp,set password and set otp screen

pubspec.lock

@@ -270,14 +270,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.4.7"
-  flutter_otp_text_field:
-    dependency: "direct main"
-    description:
-      name: flutter_otp_text_field
-      sha256: e7e589dc51cde120d63da6db55f3cef618f5d013d12adba76137ca1a51ce1390
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.5.1+1"
   flutter_plugin_android_lifecycle:
     dependency: transitive
     description:
@@ -460,10 +452,10 @@ packages:
     dependency: transitive
     description:
       name: matcher
-      sha256: dc0b7dc7651697ea4ff3e69ef44b0407ea32c487a39fff6a4004fa585e901861
+      sha256: "12956d0ad8390bbcc63ca2e1469c0619946ccb52809807067a7020d57e647aa6"
       url: "https://pub.dev"
     source: hosted
-    version: "0.12.19"
+    version: "0.12.18"
   material_color_utilities:
     dependency: transitive
     description:
@@ -568,6 +560,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "7.0.1"
+  pinput:
+    dependency: "direct main"
+    description:
+      name: pinput
+      sha256: "4c3f1b84768b47a56a1abdaca551bd7cef4ac673b882209039ecdf803a5d6e68"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.0.2"
   platform:
     dependency: transitive
     description:
@@ -737,10 +737,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: "8161c84903fd860b26bfdefb7963b3f0b68fee7adea0f59ef805ecca346f0c7a"
+      sha256: "93167629bfc610f71560ab9312acdda4959de4df6fac7492c89ff0d3886f6636"
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.10"
+    version: "0.7.9"
   typed_data:
     dependency: transitive
     description: