dods: implement tactical reload in TacticalMonitorTask

[petejefferson]

Implements tactical reload behaviour for DoDS bots.

Previously, CDoDSBotTacticalMonitorTask::OnTaskUpdate() was empty,
so bots would never reload unless forced to by the game engine (i.e.
empty clip mid-combat). This caused bots to enter engagements with
partially-spent magazines.

Changes

• dodsbot_tactical_monitor_task.h: add CountdownTimer m_reloadCheckTimer
  to throttle the reload check to once per second.

• dodsbot_tactical_monitor_task.cpp:

  • Add static bool NeedsReload(const CDoDSBotWeapon*, const CBaseBot*)
    helper that correctly handles:
    • Weapons with no clip (reserve-only ammo pools) — skipped, pressing
      reload does nothing for these.
    • Empty reserve — no point reloading if there is nothing to top up with.
    • Partial clip — reads m_iMaxClip1 via Prop_Data to detect whether
      the clip is below maximum capacity. Falls back to empty-only reload
      if the property cannot be read.
  • Implement OnTaskUpdate(): once per second, if no enemy has been visible
    in the last 5 seconds, call PressReloadButton() when NeedsReload()
    returns true.

The 5-second visibility window mirrors the rcbot2 reference implementation
(m_fLastSeeEnemy + 5.0f).