[REQUEST] Add Option to Generate a Changelog for Collections

[erinehall]

Workbench currently lacks an option to automatically generate a changelog document for collections. While changes to ATT&CK objects are visible in Workbench, they are not compiled into a formatted changelog similar to the release notes on the ATT&CK website. This makes the process of creating a changelog more tedious and time consuming, even though the required information is already available in Workbench.

Solution:
Add a feature to automatically generate a changelog for collections based on the current changes in ATT&CK objects. The changelog should be editable, allowing users to add descriptions or modify entries before it is marked as a release.

[clemiller]

Similar to #85