make CLIP interrogator download original text files if the directory does not exist

remove random artist built-in extension (to re-added as a normal extension on demand)
remove artists.csv (but what does it mean????????????????????)
make interrogate buttons show Loading... when you click them

extensions-builtin/roll-artist/scripts/roll-artist.py

@@ -1,50 +0,0 @@
-import random
-
-from modules import script_callbacks, shared
-import gradio as gr
-
-art_symbol = '\U0001f3a8'  # 🎨
-global_prompt = None
-related_ids = {"txt2img_prompt", "txt2img_clear_prompt", "img2img_prompt", "img2img_clear_prompt" }
-
-
-def roll_artist(prompt):
-    allowed_cats = set([x for x in shared.artist_db.categories() if len(shared.opts.random_artist_categories)==0 or x in shared.opts.random_artist_categories])
-    artist = random.choice([x for x in shared.artist_db.artists if x.category in allowed_cats])
-
-    return prompt + ", " + artist.name if prompt != '' else artist.name
-
-
-def add_roll_button(prompt):
-    roll = gr.Button(value=art_symbol, elem_id="roll", visible=len(shared.artist_db.artists) > 0)
-
-    roll.click(
-        fn=roll_artist,
-        _js="update_txt2img_tokens",
-        inputs=[
-            prompt,
-        ],
-        outputs=[
-            prompt,
-        ]
-    )
-
-
-def after_component(component, **kwargs):
-    global global_prompt
-
-    elem_id = kwargs.get('elem_id', None)
-    if elem_id not in related_ids:
-        return
-
-    if elem_id == "txt2img_prompt":
-        global_prompt = component
-    elif elem_id == "txt2img_clear_prompt":
-        add_roll_button(global_prompt)
-    elif elem_id == "img2img_prompt":
-        global_prompt = component
-    elif elem_id == "img2img_clear_prompt":
-        add_roll_button(global_prompt)
-
-
-script_callbacks.on_after_component(after_component)