fix locating civitai folder in custom named ComfyUI directories

[Nynxz]

Related?: #19

/run/media/user/ssd/interfaces/ComfyUI is not my install path.
Using a custom named ComfyUI Directory e.g. /run/media/user/ssd/interfaces/SomethingElse causes errors.

Fix: by not traversing as many parents.

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Error:

❌ Source path doesn't exist (checked both cases): /run/media/user/ssd/interfaces/ComfyUI/custom_nodes/Bjornulf_custom_nodes/civitai/sdxl_1.0
❌ Source path doesn't exist (checked both cases): /run/media/user/ssd/interfaces/ComfyUI/custom_nodes/Bjornulf_custom_nodes/civitai/sd_1.5
❌ Source path doesn't exist (checked both cases): /run/media/user/ssd/interfaces/ComfyUI/custom_nodes/Bjornulf_custom_nodes/civitai/pony
❌ Source path doesn't exist (checked both cases): /run/media/user/ssd/interfaces/ComfyUI/custom_nodes/Bjornulf_custom_nodes/civitai/flux.1_d
❌ Source path doesn't exist (checked both cases): /run/media/user/ssd/interfaces/ComfyUI/custom_nodes/Bjornulf_custom_nodes/civitai/flux.1_s
❌ Source path doesn't exist (checked both cases): /run/media/user/ssd/interfaces/ComfyUI/custom_nodes/Bjornulf_custom_nodes/civitai/lora_sdxl_1.0
❌ Source path doesn't exist (checked both cases): /run/media/user/ssd/interfaces/ComfyUI/custom_nodes/Bjornulf_custom_nodes/civitai/lora_sd_1.5
❌ Source path doesn't exist (checked both cases): /run/media/user/ssd/interfaces/ComfyUI/custom_nodes/Bjornulf_custom_nodes/civitai/lora_pony
❌ Source path doesn't exist (checked both cases): /run/media/user/ssd/interfaces/ComfyUI/custom_nodes/Bjornulf_custom_nodes/civitai/lora_flux.1_d
❌ Source path doesn't exist (checked both cases): /run/media/user/ssd/interfaces/ComfyUI/custom_nodes/Bjornulf_custom_nodes/civitai/lora_hunyuan_video