Add DoRA support

[lendrick]

Merging DoRAs currently fails with a Key Error.

merging C:\AI\automatic1111\models\Lora\d\36c_dora-000007.safetensors: [0.0, 0, 0, 0, 0, 0.0, 0.0, 0, 0.0, 0.0, 0, 0, 0, 0.0, 1.0, 1.0, 0.0, 0.0, 0.0, 0.0, 0, 0, 0, 0, 0, 0]
dim: [4], alpha: [2.0]
merging...
Traceback (most recent call last):
File "C:\AI\automatic1111\extensions\sd-webui-supermerger\scripts\mergers\pluslora.py", line 426, in lmerge
sd = merge_lora_models(ln, lr, settings, False, calc_precision)
File "C:\AI\automatic1111\extensions\sd-webui-supermerger\scripts\mergers\pluslora.py", line 480, in merge_lora_models
base_alpha = base_alphas[lora_module_name]
KeyError: 'lora_te1_text_model_encoder_layers_0_mlp_fc1.dora_scal'

[a-l-e-x-d-s-9]

@hako-mikan
Any updates regarding merging Doras?