feat: SLA reports view (#9189)

* feat: SLA report table


* feat: Add SLA popover card

* feat: Update popover position

* feat: Add loader

* Update SLACardLabel.vue

* feat: Update column order

* chore: fix conditions

* Update SLATable.vue

* chore: enable reports in ui

* chore: Revamp report SLA apis

* chore: revert download method

* chore: improve the code

* Update enterprise/app/views/api/v1/accounts/applied_slas/download.csv.erb

Co-authored-by: Vishnu Narayanan <iamwishnu@gmail.com>

* chore: style fixes

* chore: fix specs

* feat: Add number of conversations

* chore: review comments

* fix: translation

* Update app/javascript/dashboard/i18n/locale/en/report.json

Co-authored-by: Vishnu Narayanan <iamwishnu@gmail.com>

* Update app/javascript/dashboard/i18n/locale/en/report.json

Co-authored-by: Vishnu Narayanan <iamwishnu@gmail.com>

* Update app/javascript/dashboard/i18n/locale/en/report.json

Co-authored-by: Vishnu Narayanan <iamwishnu@gmail.com>

* Update SLAReportItem.vue

* Update report.json

* Update package.json

* chore: review comments

* chore: remove unused translation

* feat: Add TableHeaderCell component

* chore: more review fixes

* Update app/javascript/dashboard/components/widgets/TableHeaderCell.vue

Co-authored-by: Shivam Mishra <scm.mymail@gmail.com>

* Update TableHeaderCell.vue

---------

Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>
Co-authored-by: Vishnu Narayanan <iamwishnu@gmail.com>
Co-authored-by: Shivam Mishra <scm.mymail@gmail.com>

app/javascript/dashboard/components/layout/config/sidebarItems/reports.js

@@ -12,6 +12,7 @@ const reports = accountId => ({
     'label_reports',
     'inbox_reports',
     'team_reports',
+    'sla_reports',
   ],
   menuItems: [
     {
@@ -71,6 +72,14 @@ const reports = accountId => ({
       toState: frontendURL(`accounts/${accountId}/reports/teams`),
       toStateName: 'team_reports',
     },
+    {
+      icon: 'document-list-clock',
+      label: 'REPORTS_SLA',
+      hasSubMenu: false,
+      featureFlag: FEATURE_FLAGS.SLA,
+      toState: frontendURL(`accounts/${accountId}/reports/sla`),
+      toStateName: 'sla_reports',
+    },
   ],
 });