Mech Feature: Throw on punch (#4020)

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## Short description
Adds knockback to the punches of large mechs (i.e. not Vim or HAMTR),
gorilla style. Also adds a special effect for the HONK :^).
I also set the animation sprite to be the punch effect in line with the
other PR I have up. The throw power I have to be pretty low for the
industrial mechs, and ramped up for the combat mechs. Slightly higher
values for comparative syndicate mechs.

## Why we need to add this
<!-- What is the reason for adding these changes? Please post links to
Discussions as well as Bug Reports here. Please describe how this will
change the game balance. -->
This was a pretty requested change back during those rework discussions
last year. It adds some more flavor to mechs and makes them feel more
powerful.

## Media (Video/Screenshots)
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of the changes.
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pictured: My cool OC do not steal being launched into the air by a HONK
mech.
<img width="353" height="274" alt="Screenshot from 2026-04-03 03-16-15"
src="https://github.com/user-attachments/assets/980a33ba-3f64-4f9a-9fe1-a6c7e28c3152"
/>

## Checks
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- [x] I do not require assistance to complete the PR.
- [x] Before posting/requesting review of a PR, I have verified that the
changes work.
- [x] I have added screenshots/videos of the changes, or this PR does
not change in-game mechanics.
- [x] I affirm that my changes are licensed under the [MIT
License](https://github.com/ss14Starlight/space-station-14/blob/Starlight/LICENSE.TXT)
and grant permission for use in this repository under its conditions.

**Changelog**
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them using the template outside the comment. Short and informative.

:cl: STARLIGHT TEAM
- add: Added Starlight.
- remove: Removed SS13.
- tweak: Changed SS14.
- fix: Fixed Rinary.
-->

:cl: neurovermi
- add: Mechs now throw when punching with no equipment.

Author: neurovermi

Resources/Prototypes/Entities/Objects/Specific/Mech/mechs.yml

@@ -22,6 +22,11 @@
     equipmentWhitelist:
       tags:
       - IndustrialMech
+# STARLIGHT BEGIN
+  - type: MeleeThrowOnHit
+    speed: 10
+    distance: 1
+# STARLIGHT END
 
 - type: entity
   id: SpecialMech
@@ -95,6 +100,11 @@
   - type: MeleeWeapon
     hidden: true
     attackRate: 0.75
+    # STARLIGHT BEGIN
+    angle: 0
+    animation: WeaponArcFist
+    wideAnimation: WeaponArcFist
+    # STARLIGHT END
     damage:
       types:
         Blunt: 25 #thwack
@@ -447,6 +457,19 @@
       collection: FootstepClown
       params:
         variation: 0.17
+  # STARLIGHT BEGIN
+  - type: MeleeWeapon
+    hidden: true
+    attackRate: 1
+    damage:
+      types:
+        Structural: 2
+    soundHit:
+      path: /Audio/Items/bikehorn.ogg
+  - type: MeleeThrowOnHit
+    speed: 1
+    distance: 2
+  # STARLIGHT END
   - type: Mech
     baseState: base
     openState: base-open
@@ -634,6 +657,11 @@
       types:
         Blunt: 30 #THWACK
         Structural: 180
+  # STARLIGHT BEGIN
+  - type: MeleeThrowOnHit
+    speed: 15
+    distance: 2.5
+  # STARLIGHT END
   - type: MovementSpeedModifier
 # 🌟Starlight-start🌟
     baseWalkSpeed: 2 #All mechs walk at the same speed
@@ -695,6 +723,11 @@
       types:
         Blunt: 40
         Structural: 220
+  # STARLIGHT BEGIN
+  - type: MeleeThrowOnHit
+    speed: 18
+    distance: 4
+  # STARLIGHT END
   - type: MovementSpeedModifier
     baseWalkSpeed: 2 #Starlight - All mechs walk at the same speed
     baseSprintSpeed: 2.8 #Starlight - No longer unusably slow
@@ -829,6 +862,11 @@
       types:
         Blunt: 60
         Structural: 400
+  # STARLIGHT BEGIN
+  - type: MeleeThrowOnHit
+    speed: 20
+    distance: 5
+  # STARLIGHT END
   - type: MovementSpeedModifier
     baseWalkSpeed: 2 #Starlight - All mechs walk at the same speed
     baseSprintSpeed: 3.7
@@ -901,6 +939,11 @@
       types:
         Blunt: 30
         Structural: 200
+  # STARLIGHT BEGIN
+  - type: MeleeThrowOnHit
+    speed: 15
+    distance: 3
+  # STARLIGHT END
   - type: MovementSpeedModifier
     baseWalkSpeed: 2 #Starlight - All mechs walk at the same speed
     baseSprintSpeed: 4.5 # 🌟Starlight-Change - Faster than regular Gygax
@@ -976,6 +1019,11 @@
       types:
         Blunt: 50
         Structural: 400
+  # STARLIGHT BEGIN
+  - type: MeleeThrowOnHit
+    speed: 20
+    distance: 5
+  # STARLIGHT END
   - type: MovementSpeedModifier
     baseWalkSpeed: 2 #Starlight - All mechs walk at the same speed
     baseSprintSpeed: 2.2 #Starlight - No longer unusably slow