Add id based entry tactic.

[Gamenot]

This should allow the following:

Mission(
    # Specifically take over actor "traffic-replay-12"
    entry_tactic=sstudio.types.IdEntryTactic("traffic-replay-12"),
)

@qianyi-sun Please advise me if we should also add a destination-only Route.

See CHANGELOG.md

[Gamenot]

Looking at this after I implemented it, I suspect that a better implementation would require the ActorCaptureManager types to register entry tactic types that they handle so that conflicts in managed EntryTactic types can be detected between the managers and SMARTS could handle delegation of agents to these managers rather than unrestricted by the managers to all agents being the default.