ShadowformReminder

converts the options panel to RUI

- converts the options panel from AceConfig to an RUI dialog behind a Blizzard
  stub page, drops AceConfig and AceGUI
- stores the font as an LSM name rather than a path, migrating an existing
  fontPath once by matching it back to a name, and resolves it through RUI at
  apply time
- previews the reminder and makes it draggable while the config window is open,
  showing LibEditMode's selection frame in its highlight kit for the blue box
- leaves that overlay inert during the preview, its own mouse scripts reach for
  EditModeManagerFrame, and hands the drag to the reminder frame
- normalises a dragged anchor whose relative point differs from its own, so
  both save paths write the shape ApplyPosition can restore
- opens the config window when the reminder is selected in Edit Mode and closes
  it on deselect, polling the selection frame since the library raises no
  callback for it
- wraps LibEditMode's dialog Update to skip this frame, hiding it after the
  fact trips the library's OnHide and cancels the drag
- shows the reminder whatever the spec, form or death state while previewing or
  in Edit Mode, an event arriving mid-drag hid it before
- reconciles the drag scripts on PLAYER_REGEN_ENABLED, arming them writes
  protected state so it is skipped in combat
- adds .pkgmeta pinning RUI 1.5.0, fetched from its release rather than
  committed
- declares ## X-Curse-Project-ID 1686552 and records it in cf.md
- bumps version to 1.1.0