Adds Guard Conditions#249

Merged

esteve merged 3 commits intoros2-rust:mainfrom

christopherjreid:feature/guard_condition

Oct 3, 2022

Commits on Sep 30, 2022

Adds Guard Conditions
christopherjreid
committed

Commits on Oct 1, 2022

Split new functions into with/without callback, and rcl_context versions
christopherjreid
committed
Private new takes Box<dyn Fn()> instead of generic for usability
christopherjreid
committed