Add sensitive case handler

[MindOfMatter]

Added a fix for get_config_item_or_set_default to better handle the case-sensitivity problem (don't get loras with a typo, style or model problem).

def correct_case_sensitivity(value, valid_values):
    """Corrects case sensitivity of a value or list of values based on a list of valid values.
       If a valid value is contained in the input value, it replaces it with the full valid value."""
     ...
     
by example
     
def sdxl_styles_corrector(value):
    return correct_case_sensitivity(value, modules.sdxl_styles.legal_style_names)

default_styles = get_config_item_or_set_default(
    key='default_styles',
    default_value=[
        "Fooocus V2",
        "Fooocus Enhance",
        "Fooocus Sharp"
    ],
    validator=sdxl_styles_validator,
    corrector=sdxl_styles_corrector
)

so if we have "My Hyper realistic preference Negative" it will fit with "My Hyper Realistic Preference Negative" in default_styles configuration

My changes :

• replace all validator with better functions
• add new corrector function (if validator first fail)
• add new corrector function (if validator first fail)
• add flags debug logs in function (optional)
• improve get_config_item_or_set_default to handle each cases
• add better validation for get_model_filenames
• generic correct_case_sensitivity handle all possible issue cases
• improve the loras_validator
• add better sdxl_styles_validator / corrector (not have missing expected value anymore)
• improve the error logs cases
• change update_all_model_names call oder to better verification

Tested until 2 week ago from my dev branch of fork project :
MindOfMatter/Fooocus-MindOfMatter-Edition#4