Feat: Support for Microsoft Oauth in Email Channel (#6227)

- Adds the backend APIs required for Microsoft Email Channels

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>
Co-authored-by: Sojan <sojan@pepalo.com>

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

@@ -53,6 +53,10 @@
           "ENABLE": "Create conversations from mentioned Tweets"
         }
       },
+      "MICROSOFT": {
+        "HELP": "To add your Microsoft account as a channel, you need to authenticate your Microsoft account by clicking on 'Sign in with Microsoft' ",
+        "ERROR_MESSAGE": "There was an error connecting to Microsoft, please try again"
+      },
       "WEBSITE_CHANNEL": {
         "TITLE": "Website channel",
         "DESC": "Create a channel for your website and start supporting your customers via our website widget.",
@@ -548,6 +552,10 @@
       },
       "ENABLE_SSL": "Enable SSL"
     },
+    "MICROSOFT": {
+      "TITLE": "Microsoft",
+      "SUBTITLE": "Reauthorize your MICROSOFT account"
+    },
     "SMTP": {
       "TITLE": "SMTP",
       "SUBTITLE": "Set your SMTP details",