HubSpot App (#2380)

* Initial changes

* OAuth done and credentials stored

* Added "other" integrations

* Switching to hubspot api client

* Event creation for all attendees

* Update and delete done

* Doc update

* Fixing types

* App label is not mandatory

* Fixing bad merge: App label deleted

* Fixing bad automerge

* Removing  c.log

Co-authored-by: Omar López <zomars@me.com>
Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

.env.example

@@ -8,6 +8,7 @@
 # - APP STORE
 #   - DAILY.CO VIDEO
 #   - GOOGLE CALENDAR/MEET/LOGIN
+#   - HUBSPOT
 #   - OFFICE 365
 #   - SLACK
 #   - STRIPE
@@ -124,6 +125,12 @@ GOOGLE_API_CREDENTIALS='{}'
 # @see https://support.google.com/cloud/answer/6158849#public-and-internal&zippy=%2Cpublic-and-internal-applications
 GOOGLE_LOGIN_ENABLED=false
 
+#   - HUBSPOT
+# Used for the HubSpot integration
+# @see https://github.com/calcom/cal.com/#obtaining-hubspot-client-id-and-secret
+HUBSPOT_CLIENT_ID=""
+HUBSPOT_CLIENT_SECRET=""
+
 #   - OFFICE 365
 # Used for the Office 365 / Outlook.com Calendar / MS Teams integration
 # @see https://github.com/calcom/cal.com/#Obtaining-Microsoft-Graph-Client-ID-and-Secret
@@ -145,7 +152,7 @@ PAYMENT_FEE_FIXED=10           # Take 10 additional cents commission
 PAYMENT_FEE_PERCENTAGE=0.005   # Take 0.5% commission
 
 #   - TANDEM
-# Used for the Tandem integration -- contact support@tandem.chat to for API access.
+# Used for the Tandem integration -- contact support@tandem.chat for API access.
 TANDEM_CLIENT_ID=""
 TANDEM_CLIENT_SECRET=""
 TANDEM_BASE_URL="https://tandem.chat"