MeleeChemicalInjectorComponent (#2645)

* MeleeWeaponComponent OnHittingEntities event

* MeleeChemicalInjectorComponent

* Moves melee onhit action to EventBus

* serialization fix

* prototype fix

* redid chem transfer logic

* MeleeChemicalinjector uses ComponentMessages

* divide by 0 fix

* Update Resources/Prototypes/Entities/Objects/Weapons/Melee/spear.yml

Co-authored-by: py01 <pyronetics01@gmail.com>
Co-authored-by: Vera Aguilera Puerto <6766154+Zumorica@users.noreply.github.com>

Resources/Prototypes/Entities/Objects/Weapons/Melee/spear.yml

@@ -1,4 +1,4 @@
-- type: entity
+- type: entity
   name: spear
   parent: BaseItem
   id: Spear
@@ -7,22 +7,23 @@
   - type: Sprite
     sprite: Objects/Weapons/Melee/spear.rsi
     state: spear
-
   - type: MeleeWeapon
     range: 1.5
     arcwidth: 0
     arc: spear
-
   - type: Item
     size: 24
     sprite: Objects/Weapons/Melee/spear.rsi
     prefix: inhand
-
   - type: Construction
     graph: spear
     node: spear
-
   - type: ItemCooldown
+  - type: MeleeChemicalInjector
+  - type: SolutionContainer
+    maxVol: 5
+    caps: AddTo, RemoveFrom
+  - type: Pourable
 
 - type: MeleeWeaponAnimation
   id: spear