Fix lengths of enum-linked arrays

[quietust]

to automatically infer the length based on the values in the enum, so that when Toady adds new enum entries we don't end up missing them.

No structures should report any size differences (aside from enum types being created or renamed) - if they do, it means I made a mistake somewhere.

[github-actions]

The sizes of the following types have changed in this pull request. Please verify that this is intentional. Note that renamed types are not currently detected and will also be listed here.

Type	Platform	Previous size	New size (this PR)	Change
barrack_preference_category	linux64	4	2	-2
barrack_preference_category	windows64	4	2	-2
infrastructure_type	linux64	0	4	+4
infrastructure_type	windows64	0	4	+4
init_load_bar_texture_type	linux64	0	4	+4
init_load_bar_texture_type	windows64	0	4	+4
keybinding_category	linux64	4	0	-4
keybinding_category	windows64	4	0	-4
keybinding_category_type	linux64	0	4	+4
keybinding_category_type	windows64	0	4	+4
text_set_type	linux64	0	4	+4
text_set_type	windows64	0	4	+4
texture_type	linux64	0	4	+4
texture_type	windows64	0	4	+4
trade_category_type	linux64	0	4	+4
trade_category_type	windows64	0	4	+4

This is an automated comment. Please leave a reply if you think that the above information is incorrect.

[quietust]

All type size changes listed above are expected; however, some DFHack code changes are required in order to cope with this update (DFHack::Gui::addCombatReport needs to tolerate the "NONE" enum member).