Taekwondo buffs are always working despite wielding something.

[Lupinos]

Describe the bug

By its description, I think taekwondo buffs should not be available if you are wielding anything.
I check the code and find:

Here, this piece of code make 'valid_melee' always true whether you wield anything or not. I guess 'valid_melee' is used to check if the weapon is feasible to use the techniques or buffs, 'force_unarmed' should not affect weapons check.
If I delete the "forced_unarmed || ", it seems that it works fine.

By the way, here might be a relevant bug: If I wield anything, for example a heavy sledge. select taekwondo.Then when I smash something, the damage is calculated by sledge but the stamina cost is calculated as unarmed. I think there might be a little problem in Character::used_weapon().

Last question, if I believed I have fixed them, can I make a PR for them or should I ask anyone/make a confirmation first?

Attach save file

N/A

Steps to reproduce

About taekwondo buff:

1，create a random character, and choose taekwondo.
2，wield anything you find and choose taekwondo
3，inspect your status.

About stamina cost:
1，create a random character, and choose taekwondo.
2，spawn a heavy sledge, wield it, and choose taekwondo
3，smash something for several times.
4，see your stamina bar.

Expected behavior

1，If character wield something, he/she should not get buffs from taekwondo.
2，If character wield something heavy and smash, he should cost more stamina, or the damage should be revised.

Screenshots

No response

Versions and configuration

2ba772a

Additional context

No response

[Zenefess]

In data\json\martialarts.json, in the style_taekwondo entry, the static buff buff_taekwondo_static2 is missing the line "strictly_unarmed": true, after "unarmed_allowed": true,. Adding it in prevents buff_taekwondo_static2 from taking effect, and prevents globally affecting usage of valid_melee.

Testing:
Loaded existing save. "Unhindered" appears. Pick up freezer. "Unhindered" disappears. Drop freezer and wait a turn. "Unhindered" reappears. Repeat process with rifle. Same result.

[Zenefess]

Further testing:
Loaded existing save and repeated above process with carving knife, then knuckle dusters. Same result as above.
Started new game and repeated above process with pocket knife. Same result as above.

[github-actions]

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