Per-skill usage analytics and plugin download options

This release adds per-skill time series data to the hooks summary API, powering new skill usage charts in the dashboard. A dropdown now lets users choose between Claude and Cursor installation when downloading published plugins.

Features

• Per-skill time series in hooks summary API #2381  - Added per-skill time series data to the hooks summary API to enable skill-level usage charting. (Author: @alx-xo )
• Skill usage analytics charts #2382  - Added skill usage time series and users-per-skill charts to the dashboard. (Author: @alx-xo )
• Plugin download dropdown for Claude and Cursor #2413  - Added a dropdown on the plugin download action offering both Claude and Cursor installation options. (Author: @bradcypert )