refactor: Phase 1 抽出 shared/skills_data 解耦 daily 与 bot

daily 不再通过 sys.path 导入 bot/skills_service，skills feed 数据层上移到 shared/。

Co-authored-by: Cursor <cursoragent@cursor.com>

shared/__init__.py

@@ -0,0 +1,10 @@
+"""Repo-root shared modules (skills feed data, etc.)."""
+
+from shared.skills_data import (
+    Board,
+    format_installs,
+    load_feed,
+    warm_feed_cache,
+)
+
+__all__ = ["Board", "format_installs", "load_feed", "warm_feed_cache"]