Item damage calculation rework.

[MistakeNot4892]

Description of changes

• Removes throwforce, force, various related variables.
• Blows away a lot of specific var overrides of the above to clean the slate.
• Removes /twohanded and repaths the existing twohanded weapons to other types.
• Twohanding now checks slot or hand dexterity against weapon attack dexterity.
• Revisits/simplifies weapon force calculation.
• Renames several multipliers to shorter names.

TODO

• [x] Coarse retype and unification.
• [x] Update pipe wrench to play nicely with base wrench code.
• [x] Convert axes to use the various /bladed material and icon handling.
• [x] Convert spears to above.
• [x] Update gun twohanding.
• [x] Verify baseball bats work as expected.
• [x] Wielded icons for broadsword
• [x] Wielded icons for longsword
• [x] Readd base attack force to atoms that previously relied on the material damage multiplier.
• [x] Reimplement material based damage calculation.
• [x] Revisit thrown, material and wielding multipliers. Do a spreadsheet to make sure weapons are sane with a variety of materials.
• [X] Verify force and damage flag updates are correct.
• [x] Add migration txt

Why and what will this PR improve

• Cleaner code.
• More predictable, saner and cleaner damage calculation.
• Makes twohanding generally available to all item types.
• Makes force calculation more intuitive/cleaner.

Authorship

Myself.

Changelog

TODO before merge.