Allow extensions to auto-register tasks within a project

[cweagans]

Check for existing issues

• Completed

Describe the feature

Tasks defined in a JSON file are great. However, there are a number of common tools that already define tasks. It would be great to simply import those tasks and expose them to Zed when a project is opened. Think Makefile, Taskfile, etc.

Prior art: https://extensions.panic.com/extensions/littlegreenman/littlegreenman.TaskFinder/

If applicable, add mockups / screenshots to help present your vision of the feature

No response