Add clock asset and enhance meeting time dialogs

- Added a new clock icon asset to the AssetsManager.
- Updated MeetingTimeBottomSheet and MeetingTimeDialog to include a close button for better user experience.
- Introduced MeetingTimeSuccessfulRegisteredBottomSheet and MeetingTimeSuccessfulRegisteredDialog for confirming meeting time registration.
- Refactored submission dialogs to improve layout and interaction consistency.

lib/views/shared/select_submission_bottom_sheet.dart

@@ -27,7 +27,7 @@ class _SelectSubmissionBottomSheetState
         Container(
           width: double.infinity,
           // height: 272.0.h(),
-          padding: EdgeInsets.fromLTRB(24.0.w(), 12.0.h(), 24.0.w(), 33.0.h()),
+          padding: EdgeInsets.fromLTRB(24.0.w(), 24.0.h(), 24.0.w(), 33.0.h()),
           decoration: BoxDecoration(
             color: AppColors.backgroundColor,
             borderRadius: const BorderRadius.only(
@@ -37,23 +37,41 @@ class _SelectSubmissionBottomSheetState
           ),
           child: Column(
             children: [
-              Align(
-                alignment: AlignmentDirectional.centerStart,
-                child: IconButton(
-                  onPressed: () {
-                    context.pop();
-                  },
-                  icon: const Icon(Icons.close),
-                ),
-              ),
-              Text(
-                CommonStrings.selectSubmission,
-                style: TextStyle(
-                  fontSize: 20.0.sp(),
-                  fontWeight: FontWeight.w600,
-                  color: AppColors.grey70,
-                ),
+              Row(
+                mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                children: [
+                  Text(
+                    CommonStrings.selectSubmission,
+                    style: TextStyle(
+                      fontSize: 20.0.sp(),
+                      fontWeight: FontWeight.w600,
+                      color: AppColors.grey70,
+                    ),
+                  ),
+                  InkWell(
+                    onTap: () {
+                      context.pop();
+                    },
+                    splashColor: Colors.transparent,
+                    child: Container(
+                      width: 24.0.w(),
+                      height: 24.0.w(),
+                      decoration: BoxDecoration(
+                        shape: BoxShape.circle,
+                        border: Border.all(color: AppColors.grey60, width: 2.0),
+                      ),
+                      alignment: Alignment.center,
+                      child: Icon(
+                        Icons.close,
+                        color: AppColors.grey60,
+                        size: 16.0,
+                      ),
+                    ),
+                  ),
+                ],
               ),
+              SizedBox(height: 16.0.h()),
+              Divider(color: AppColors.grey20),
               SizedBox(height: 8.0.h()),
               _submissionType(
                 title: CommonStrings.selfApply,