feat: Add and remove influence (#330)

* Add and remove influence

* Added set and get influence

* inline

---------

Co-authored-by: VALERA771 <[email protected]>

EXILED/Exiled.API/Features/Respawn.cs

@@ -326,6 +326,34 @@ public static bool SetTokens(SpawnableFaction spawnableFaction, int amount)
             return false;
         }
 
+        /// <summary>
+        /// Grants influence to a given <see cref="Faction"/>'s <see cref="ILimitedWave"/>s.
+        /// </summary>
+        /// <param name="faction">The <see cref="Faction"/> to whose <see cref="ILimitedWave"/>s to grant influence.</param>
+        /// <param name="amount">The amount of influence to grant.</param>
+        public static void GrantInfluence(Faction faction, int amount) => FactionInfluenceManager.Add(faction, amount);
+
+        /// <summary>
+        /// Removes influence from a given <see cref="Faction"/>'s <see cref="ILimitedWave"/>s.
+        /// </summary>
+        /// <param name="faction">The <see cref="Faction"/> from whose <see cref="ILimitedWave"/>s to remove influence.</param>
+        /// <param name="amount">The amount of influence to remove.</param>
+        public static void RemoveInfluence(Faction faction, int amount) => FactionInfluenceManager.Remove(faction, amount);
+
+        /// <summary>
+        /// Get influence to a given <see cref="Faction"/>.
+        /// </summary>
+        /// <param name="faction">The <see cref="Faction"/> to get influence.</param>
+        /// <returns>Get the faction influence..</returns>
+        public static float GetInfluence(Faction faction) => FactionInfluenceManager.Get(faction);
+
+        /// <summary>
+        /// Set influence to a given <see cref="Faction"/>.
+        /// </summary>
+        /// <param name="faction">The <see cref="Faction"/> to set influence.</param>
+        /// <param name="influence">The amount of influence to set.</param>
+        public static void SetInfluence(Faction faction, float influence) => FactionInfluenceManager.Set(faction, influence);
+
         /// <summary>
         /// Starts the spawn sequence of the given <see cref="Faction"/>.
         /// </summary>