Fixing knockback & movement.

• Adjusting the knockback to be reasonable level.
• Rewrite movement code to use acceleration.
• Adjusted speed, mass, and linear drag of the prefabs.
• Moved TryMove() down to Character.
• Made character death remove the object from the world by default.
• Created some starting code for the ability system (Not working yet, please don't touch)

MrBigsock/Assets/Code/Core/Abilities/Base/BaseAbility.cs

+using System.Collections;
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.InputSystem;
+
+
+namespace BigSock {
+
+	/*
+		Base class for abilities.
+	*/
+	public abstract class BaseAbility : IAbility {
+		/*
+			The cooldown of the ability in seconds.
+		*/
+		public TimeSpan Cooldown { get; set; } = new TimeSpan(0, 0, 0, 0, 250); // 1/4 seconds.
+
+		/*
+			The name of the ability.
+		*/
+		public string Name { get; set; }
+		
+		/*
+			The description of the ability.
+		*/
+		public string Description { get; set; }
+
+		/*
+			The id of the ability.
+		*/
+		public ulong Id { get; set; }
+
+		/*
+			The next time the ability has cooled down.
+		*/
+		public DateTime NextTimeCanUse { get; set; } = DateTime.Now;
+
+		/*
+			Whether the ability is ready.
+		*/
+		public bool Ready => NextTimeCanUse <= DateTime.Now;
+
+
+
+
+
+		/*
+			Try to use the ability.
+			Handles cooldown and ability cost here.
+			Returns true if the ability was successfully used.
+		*/
+		public bool Use(Character actor, Vector2 target) {
+			// Check that the ability is cooled down.
+			if(Ready) {
+				//> Handle checking costs here.
+
+				// Activate the ability.
+				var res = Activate(actor, target);
+
+				// If it succeeded, update cooldown and pay ability cost.
+				if(res) {
+					NextTimeCanUse = DateTime.Now + Cooldown;
+					//> Handle paying the cost (HP, mana, stamina) here.
+				}
+
+				return res;
+			}
+			return false;
+		}
+
+
+
+		/*
+			Activates the ability.
+			Returns true if the ability was successfully activated. 
+				- Even if nothing was hit, used to indicate that cooldowns should be updated.
+			This should be overridden in sub-classes for the actual abilities.
+		*/
+		protected abstract bool Activate(Character actor, Vector2 target);
+
+	}
+
+	/*
+	Notes:
+		- Subclasses should override Activate() to implement their actual functionality.
+		- Use() should not be overridden unless absolutely neccesary.
+		- Activate() can be used to hold special conditions, if it returns false, no cooldowns or costs will be enforced.
+			+ An ability that can only be activated if there is a valid target, Activate() can return false if no targets found.
+		- Planning to expand code later:
+			- Allow passing a target character instead of a position.
+			- Return a result object instead of just bool to allow for more fine grained controll, like resetting cooldown without mana cost.
+			- Adding cost management, use count limits (pr lvl or in total)
+	*/
+}
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