Move Web Terminal File Sync to Core

Overview

As part of an effort to open source some currently paid features and move them to our free tier the Web Terminal File Sync for Web IDE has been identified as a feature worth moving down.

Proposal

The Web Terminal File Sync for Web IDE should be moved to core. This requires the removal of any licensing checks for the feature which is currently in the Ultimate tier.

Documentation

Documentation for this feature should be updated to reflect that this is no longer in a paid tier. However, the feature is not available to all users as it still requires specific runners for use of the feature.