v0.33.0 - Pre-built integrations, managed integrations

🚨 Breaking changes

	Title	Issue/PR	Description
1	Proxy: Backfill Base URLs	#1059	Backfilled many API base URLs. Some were modified: FreshService, Pannylane, RingCentral, Sage, Evaluagent.

✨ New Features

#	Title	Issue/PR	Description
1	Pre-built integrations	#983	Activate public syncs & actions directly from the dashboard with just a few clicks.
2	Managed integrations	#983	Let Nango implement and deploy custom integrations directly to your account.
3	Key Rotation	#488	Introduce the option to rotate both secret and public keys for enhanced security.
4	In-Dashboard Scripts	#841	Access and download sync/action scripts directly from the dashboard.
5	Enhanced Action Tooling	#993	Introducing the dedicated NangoAction interface for action scripts.
6	App Version Display	#841	View the Nango app version in the 'Project Settings' section of the dashboard.
7	Instant Sync Start	#1036	Initiate a sync immediately, without waiting for the next scheduled run.
8	Optional Action Return Model	#1009	Simplify actions without outputs – no return model specification required.
9	Slack Webhook Capture	#1026	Securely capture webhook URL metadata during the OAuth process.
10	OAuth Parameter Override	#1040	Easily override pre-set OAuth parameters from the frontend SDK as needed.
11	New API: Highlevel	#1057

🐞 Bug Fixes

#	Issue/PR	Description
1	#963	Fixed scheduling issues with Nango Sync.
2	#953	Resolved layout disruption caused by lengthy connection IDs.
3	#1032	Disabled the auto-fill option for environment variables.
4	#1060	Corrected token introspection for Salesforce sandbox.
5	#1061	Addressed the issue where sync deploy activity log messages appeared empty.
6	#1016	Fixed intermittent failures related to token refresh/validity.
7	#1027	Resolved the issue blocking environment variable deletion when it's the only one present.