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>

Content.Client/IgnoredComponents.cs

@@ -28,6 +28,7 @@
             "Wrench",
             "Crowbar",
             "MeleeWeapon",
+            "MeleeChemicalInjector",
             "Dice",
             "Construction",
             "Door",