fix: unset animationAssetIds to allow player-set animations

[intheviewof]

quick hack to allow player specified r15 animations (walk, run, etc) by unsetting hardcoded asset ids. this allow users to edit their GameConfig.toml and specify the IDs of animations they wish to use (i.e: Stylish Run)
tested & working on 2018 and 2021. i only tested this very lightly but this single change shouldn't have any negative effects

not my discovery, but i can't remember who found it first

tested with the following accessory data:

retrieve_avatar_call_mode = "lua"
retrieve_avatar = '''
function(user_id_num, user_code)
    local default_avatar = {
        type = 'R15',
        items = {},
        scales = {
            height = 1,
            width = 1,
            head = 1,
            depth = 1,
            proportion = 0,
            body_type = 0,
        },
        colors = {
            head = BrickColor.Random().Number,
            left_arm = BrickColor.Random().Number,
            left_leg = BrickColor.Random().Number,
            right_arm = BrickColor.Random().Number,
            right_leg = BrickColor.Random().Number,
            torso = BrickColor.Random().Number,
        },
    }

    if user_code == 'Yuri' then
        default_avatar.items = {
			125157548394108,
            7581780596,
			4603805914,
			20573078,
			12413229126,
			619512153,
        }
        default_avatar.colors = {
            head = 148, 
            left_arm = 148,
            left_leg = 148,
            right_arm = 148,
            right_leg = 148,
            torso = 148,
        }
        default_avatar.scales = {
            height = 1,
            width = 1,
            head = 1,
            depth = 1,
            proportion = 0,
            body_type = 0, 
        }

    elseif user_code == 'Player2' then
        default_avatar.items = {
			12596168028,
            8262048015,
            7259172148,
            6471948627,
            6380112434,
            6238565077,
            6067201766,
            6067201270,
            4660621665,
            4466228735,
            6202647707,
            7317773,
        }
        default_avatar.colors = {
            head = 125, 
            left_arm = 125,
            left_leg = 125,
            right_arm = 125,
            right_leg = 125,
            torso = 125,
        }
        default_avatar.scales = {
            height = 1,
            width = 1,
            head = 1,
            depth = 1,
            proportion = 0,
            body_type = 0, 
        }
		
		elseif user_code == 'Yuri_alt' then
        default_avatar.items = {
			125157548394108,
            7581780596,
			4603805914,
			20573078,
			12413229126,
			619512153,
        }
        default_avatar.colors = {
            head = 125, 
            left_arm = 125,
            left_leg = 125,
            right_arm = 125,
            right_leg = 125,
            torso = 125,
        }
        default_avatar.scales = {
            height = 1,
            width = 1,
            head = 1,
            depth = 1,
            proportion = 0,
            body_type = 0, 
        }


    end
    return default_avatar
end
'''

Summary by CodeRabbit

• Bug Fixes
  • Character appearance endpoint now returns empty animation asset identifiers instead of previously hardcoded animation mappings.

[coderabbitai]

Walkthrough

The v463 character appearance endpoint now returns an empty animationAssetIds object instead of hardcoded animation ID mappings. All other response fields remain unchanged.

Changes

Character appearance endpoint

Layer / File(s)	Summary
v463 avatar animation assets response Source/web_server/endpoints/avatar.py	animationAssetIds simplified from populated animation mapping to empty object in avatar JSON response.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	Title accurately reflects the main change: unsetting animationAssetIds to enable custom animations, matching the code modification and PR objectives.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[frostyyyy1]

@intheviewof Stylish Run also does not work for me, even if remove those animation ids.