fix: Reverts to RunUO speeds, fixes direction glitching, adds movement speed interpolation (#1695)

> [!IMPORTANT]  
> Please read through these changes, as they changed certain expectations for how the internal AI thinking/movement work.
> Note that some mobs still don't have smooth movement on ClassicUO due to how the client handles animations/movement.

### Summary
- **Important Change**: Mobs will now move at a more regular pace. If the OnThink results in a move, but the cooldown would otherwise prevent the move, then the movement is scheduled on another timer.
- Added a 400ms delay to mobs turning to face a player to attack in order to avoid glitching between moving and turning.
- Reverted AI thinking speeds back to RunUO specific speeds.
- Reverted the AI thinking to moving conversion delays back to RunUO.
- For thinking speeds that are not exactly the predefined speeds from RunUO, there is a new calculation to determine the correct conversion to movement speed. This stops speeds like `0.35` from being faster than `0.3`

> [!NOTE]  
> **Developer Note**
> BaseAI.CheckMove() no longer contains the check for whether or not a mob is on movement cooldown. This function can now be overwritten without causing issues to figuring out that cooldown.

Distribution/Data/npc-speeds.json

@@ -1,8 +1,14 @@
 [
+  {
+    "level": "VerySlow",
+    "active": 0.4,
+    "passive": 0.8,
+    "types": []
+  },
   {
     "level": "Slow",
-    "active": 0.35,
-    "passive": 0.5,
+    "active": 0.3,
+    "passive": 0.6,
     "types": [
       "AntLion", "ArcticOgreLord", "BogThing",
       "Bogle", "BoneKnight", "EarthElemental",
@@ -20,8 +26,8 @@
   },
   {
     "level": "Medium",
-    "active": 0.275,
-    "passive": 0.45,
+    "active": 0.25,
+    "passive": 0.5,
     "types": [
       "AcidElemental", "AgapiteElemental", "Alligator",
       "AncientLich", "Betrayer", "Bird",
@@ -132,7 +138,7 @@
   {
     "level": "VeryFast",
     "active": 0.125,
-    "passive": 0.3,
+    "passive": 0.30,
     "types": [
       "Barracoon", "Mephitis", "Neira",
       "Rikktor", "Semidar", "EnergyVortex",