docs: add plugin core and Telegram/OpenClaw adapter skeleton / 補 reply-end-controls 核心與 Telegram/OpenClaw 設計骨架

telegram/callback-handler.md

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+# Telegram Callback Handler
+
+## Responsibility
+
+Receive Telegram callback queries, parse reply-end button clicks, normalize them, and hand them off to the reusable state/policy layer.
+
+## V1 actions
+
+- parse `rec:continue`
+- parse `rec:stop`
+- map into normalized callback event
+- write updated state
+- update original message buttons to show resolved choice
+
+## V1 UI behavior after click
+
+Suggested resolved button state:
+
+- selected option gains a clear marker
+- the message should not remain indefinitely clickable as if no decision happened