KP_RaidCD

1. Added bottom-right resize handle
- In unlocked state, a drag handle appears at the bottom-right corner of first timer bar's anchor, allowing direct dragging to change the width and height of the entire frame
- All timer bars and anchors synchronize in real-time during dragging, and in the settings panel are updated accordingly
- The handle automatically hides after locking, without affecting normal use

2. Fixed position saving issue
- Changed anchor positioning from TOPLEFT toLEFT, fixing the issue where the frame offsets and eventually returns to the center of the screen after logging back into the game
- The position after using /kpr lock is now saved and no longer drifts

3. Auto-marking (Raid Role Icons)
   - Added "Auto-mark" tab to the settings panel
   - Automatically adds mark icons to tanks and healers based on raid/party roles
   - Supports custom marks for tanks and healers (8 icons available, such as square/circle/star, etc
   - Only raid leaders/assistants can mark in raids, while all party members can mark in parties; compatible with cross-realm groups
   - Party fingerprint defense: only once when party members remain unchanged, preventing multiple players' different addon settings from overwriting each other
   - Members with existing marks are automatically skipped, avoiding stealing marks from addons

4. Actual cooldown auto-sync
   - When casting a spell, the actual cooldown is obtained via `GetSpellCooldown()` (including reductions from talents/sets/, etc.)
   - The actual cooldown in seconds is broadcast to all party/raid members who have this addon installed via the `KPCD` addon message
   - All bars for everyone in the raid count down according to the **actual cooldown time**, no longer strictly adhering to preset values
   - Cache is automatically cleared after leaving the group, without the next group entry
   - **Example**: Divine Sacrifice is originally set to 120 seconds. If a Paladin equips 2T10 to reduce the cooldown 96 seconds, all timer bars for everyone in the raid will count down from 96 seconds instead of 120