Hierarchical copy-from inheritance for classic zombies

[I-am-Erk]

Summary

Balance "Minor balance edits to 'classic' zombies along with new inheritance infrastructure"

Purpose of change

This is a new approach to #52084 to add weakpoints structures to zombies. This problem has proven to be one better solved with some JSON churn, creating a copy-from inheritance structure for zombies and other common monsters.

Describe the solution

1. Create a copy-from inheritance structure for classic zombies. This creates several abstract versions of zombies, defined by their body plan and what sort of weakpoints they have. Currently:

• "mon_zombie_base" - common inheritance source for all zombies
• "mon_zombie_tough_base" - adds some hp and adjusts weakpoints and attacks
• "mon_zombie_fat_base" - adds some armour and adjusts weakpoints to suit
• "mon_zombie_crawling_base" - removes legs
• "mon_zombie_bodyarmor_base" - eg. cops, soldiers, swat zombies that all have a common set of weak points in their armour
• "mon_zombie_enclosed_base" - eg. firefighters, hazmat zombies wearing something that encloses them head to toe in a fairly uniform way.

2. While going through every zombie meticulously, audit several outstanding issues.

• adds weakpoints as in Begin integrating new weakpoints info #52084
• adds an upgrade list for cop zombies
• adjusts the scratch attack on crawling zombies to hit legs and feet primarily
• lengthens evolution timer on all affected zombies due to overall lengthening game timeframes

3. Adjusts wording of json_inheritance.md as it is no longer so desirable to avoid copy-from inheritance as this game grows.
4. In preparation for changes, breaks up zed_misc.json without changing anything.

Upcoming: In this PR I will only go through classic zombies. In a future PR I will do this for child zombies and then other versions.

Describe alternatives you've considered

It's debatable if tough zombies need their own base. Currently it's not used anywhere else.

I don't need to audit these other issues at the same time, but I'm in there and I've wanted this done for a while

Testing

Loads in game
Needs more testing

Additional Context

This will open up a lot of stuff to much easier modding. That is an intended side effect. You can now edit zombie_base in your mod and it will pass those changes on to everything downstream.

[Squishums]

All human zombies, to be clear.

[Squishums]

Will this not inherit the leg weak point?