Add implementation plans for YouTube and Kick integrations

[Copilot]

Twitch is currently the only supported streaming provider; this adds concrete implementation plans to deliver YouTube Live and Kick parity (auth, chat, lifecycle, and rollout) without disrupting existing Twitch users.

• Objectives & rollout: Define phased delivery (foundation, chat/lifecycle, parity features, hardening) and success metrics for YouTube Live and Kick support.
• Architecture: Document a StreamingProvider contract and provider-aware sockets to plug in YouTube and Kick alongside Twitch while keeping compatibility defaults.
• Auth & quotas: Specify Google OAuth scopes (with deprecation note), Kick OAuth/token prerequisites, token storage, and current quota/limit assumptions to guide rate limiting with validation blockers.
• Chat & events: Outline ingestion, TTL-based replay protection, role mapping, outbound rate-limiting strategy, and stream online/offline detection for both providers.
• Features & risks: Clarify polling/predictions options (API check vs. manual fallback), localization reuse, observability, rollout gating, and risk mitigations; include Kick poll/bet fallback mechanics with voting windows and deduplication.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Plan out youtube integration</issue_title>
<issue_description></issue_description>

<agent_instructions>create a full implementation plan for youtube integration. currently, only twitch is supported.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Plan out youtube integration #558

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[Geczy]

@copilot likewise lets add kick integration planning as well

here's the list of things we use twitch for, that could come to kick

• bets open / close
• online/offline detection
• automatic username change detector
• poll / bets overlay
• all of the twitch chat commands
• W L will only show last 12 hours, since it doesn't knwo when you were online/offline
• every time you stream, you may have to type !resetwl
  there might be more to consider for youtube and kick

[Copilot]

@copilot likewise lets add kick integration planning as well

...

Added a Kick integration implementation plan (bets/polls overlay strategy, online/offline detection, username change detection, W/L reset flow, provider wiring) in TechnicalOverview.md — see commit 079f682.