Add match result evaluation with live scoreboard in the Esc menu

MatchManager tracks per-participant outcomes from match start (hunter /
hiding / found / converted / left), freezes hit rows with seek time and
finder name, and decides the winner at seek end (any untouched hider ->
hiders win). Results replicate via a Match_Result named message,
broadcast live on hide start, every hit and mid-match leave (no-op once
the winner is frozen), with late joiners served the current state.

MatchResultScreen renders the scoreboard as a section of the session
panel: winner banner ("Match in progress" while live), summary counts
and pooled rows (name, outcome, time, found by); the section hides when
no result data exists. OnlineSessionBrowserUI auto-opens the Esc
overlay when the Resolution sub-phase begins.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Assets/Scripts/Network/UI/MatchResultScreen.cs.meta

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