Release v2.0.0

Features/feedback planner (#2)

* add: feedback and repeat option PlannedTeam instead of stop_callback
add: new unit tests
add: vscode formatter settings

* fix: make feedback variable name configurable

* add: note to support plan resuming

* update: README to include semver logo
fix: broken tests

* add: refine notebook comments and docs

* fix: run test workflow only when code changes
add: improve README