Add Raid Control panel (Blizz UI Enhanced)

[rafaelcustodio]

Summary

Adds Raid Control — a compact, movable raid-management panel inspired by ElvUI's RaidUtility, but self-contained on EllesmereUI primitives (no Ace/oUF/ElvUI).

A "Raid Control" button appears whenever you are in a (non-PvP) group and opens a panel with:

• Raid target / world markers (left-click = target icon, right-click = matching world flare; last button clears)
• Raid Menu, Disband, Ready Check, Role Poll, Main Tank/Assist, Countdown
• Dropdowns: Difficulty, Convert raid↔party, Restrict Pings
• "Everyone is Assistant" toggle

Details

• Implementation: EllesmereUI_RaidControl.lua (parent file). Open/close runs through SecureHandlerClickTemplate so it works in combat; the automatic group-based show/hide is deferred out of combat (PLAYER_REGEN_ENABLED). Secure frames are only built/attributed out of combat.
• Markers: numbered icons use secure macros (/tm, /wm) with useOnKeyDown=false so the up-click action isn't dropped under the cast-on-down CVar. World flares are remapped to match the target-icon colors; the clear button clears the target icon (left) and all world markers (right, via the secure worldmarker action). Ordered like ElvUI (skull→star, then clear) at the bottom of the panel.
• Dropdowns: re-generate on the relevant confirmation events (e.g. PLAYER_DIFFICULTY_CHANGED, GROUP_ROSTER_UPDATE) so the collapsed text reflects the new (async) value.
• Positioning: handled through Unlock Mode (registered element); default placement mirrors ElvUI (TOP, -400, top edge).
• Configuration: an Enable Raid Control toggle in Blizz UI Enhanced → Tooltips, Menus & Popups; enabling prompts a reload so the mover and secure frames register before positioning.
• Blizzard manager: enabling Raid Control hides the Blizzard CompactRaidFrameManager (reusing the shared hide-party-frame helper), since Raid Control replaces it.
• Regenerated Locales/_keys.txt.

Taint

The panel hosts SecureActionButton children (markers, Main Tank/Assist), so open/close goes through the secure environment and frames are built out of combat.