CODSlide 1.7.8 - Sniper Startup Input Fix

Changes from 1.7.7:
- Fixes the temporary low-sensitivity/drag feeling seen only with sniper rifles at the instant a slide begins.
- CODSlide still never changes mouse sensitivity, camera yaw/pitch, ADS FOV or scope rendering.
- The local slide startup is now split into two phases:
  1) the first 4 client ticks apply slide velocity while keeping the previous local pose, eye height and sprint flag stable;
  2) after the burst settles, the normal SWIMMING slide pose, compact dimensions and sprint-stop state are applied.
- Remote players still receive the slide state immediately and keep the normal low slide animation.
- Slide speed, distance, locked direction, slide-jump Bhop 0.68 cap, omni Bhop, air control and item-weight filter are unchanged.
- Uses a common-side helper with no TaCZ internal classes, mixins, renderer hooks, camera hooks or FOV hooks.
- Protocol remains 2.
