feat - Add filter for reports by agent, label and inboxes (#3084)

* Adds filter for agents, labels and inboxes

* Added Inboxes Reports Feature

* Fixed populating of filter dropdown issue

* If applied, fixes code climate style-lint warnings

* Fixes codeclimate warnings

* if applied, Refactors sidebar file to fix codclimate warnings

* if applied, fixes the download reports button for filtered report-data

* If applied, replaces native img tag with thumbnail component

* If applied, replaces hardcoded color string with variable

* If applied, adds a11y labels to multiselect dropdowns

* If applied, Renames reports methods to generic names

* If applied, Adds test cases for Labels and Inboxes

* If applied, write a test spec for fileDownload helper

* if applied, Moves fileDownload method to a utils folder

* If applied, Fixes the report file name type

* Test Spec for Reports Store module

* Fix specs - add restoreAllMocks

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

app/javascript/dashboard/i18n/locale/en/settings.json

@@ -146,7 +146,10 @@
     "CSAT": "CSAT",
     "CAMPAIGNS": "Campaigns",
     "ONGOING": "Ongoing",
-    "ONE_OFF": "One off"
+    "ONE_OFF": "One off",
+    "REPORTS_AGENT": "Agents",
+    "REPORTS_LABEL": "Labels",
+    "REPORTS_INBOX": "Inbox"
   },
   "CREATE_ACCOUNT": {
     "NO_ACCOUNT_WARNING": "Uh oh! We could not find any Chatwoot accounts. Please create a new account to continue.",