Various fixes

1) Downgrade numpy to avoid dependency conflict with numba
2) Move all non ldm/invoke files into `invokeai`. This includes assets, backend, frontend, and configs.
3) Fix up way that the backend finds the frontend and the generator finds the NSFW caution.png icon.

.gitignore

@@ -231,8 +231,5 @@ installer/install.sh
 installer/update.bat
 installer/update.sh
 
-# this may be present if the user created a venv
-invokeai
-
 # no longer stored in source directory
 models

invokeai/README

@@ -0,0 +1,3 @@
+After version 2.3 is released, the ldm/invoke modules will be migrated to this location
+so that we have a proper invokeai distribution. Currently it is only being used for
+data files.

invokeai/backend/__init__.py

@@ -0,0 +1,5 @@
+'''
+Initialization file for invokeai.backend
+'''
+from .invoke_ai_web_server import InvokeAIWebServer
+

invokeai/backend/invoke_ai_web_server.py

@@ -11,16 +11,18 @@ from threading import Event
 from uuid import uuid4
 
 import eventlet
+from pathlib import Path
 from PIL import Image
 from PIL.Image import Image as ImageType
 from flask import Flask, redirect, send_from_directory, request, make_response
 from flask_socketio import SocketIO
 from werkzeug.utils import secure_filename
 
-from backend.modules.get_canvas_generation_mode import (
+from invokeai.backend.modules.get_canvas_generation_mode import (
     get_canvas_generation_mode,
 )
-from backend.modules.parameters import parameters_to_command
+from invokeai.backend.modules.parameters import parameters_to_command
+from invokeai import frontend
 from ldm.generate import Generate
 from ldm.invoke.args import Args, APP_ID, APP_VERSION, calculate_init_img_hash
 from ldm.invoke.conditioning import get_tokens_for_prompt, get_prompt_structure
@@ -254,16 +256,14 @@ class InvokeAIWebServer:
                 )
 
     def find_frontend(self):
-        my_dir = os.path.dirname(__file__)
-        # LS: setup.py seems to put the frontend in different places on different systems, so
-        # this is fragile and needs to be replaced with a better way of finding the front end.
-        for candidate in (os.path.join(my_dir,'..','frontend','dist'),          # pip install -e .
-                          os.path.join(my_dir,'../../../../frontend','dist'),   # pip install . (Linux, Mac)
-                          os.path.join(my_dir,'../../../frontend','dist'),      # pip install . (Windows)
-        ):
-            if os.path.exists(candidate):
-                return candidate
-        assert "Frontend files cannot be found. Cannot continue"
+        for candidate in [
+                *frontend.__path__,
+                Path(__file__).parent / '..' / 'frontend'
+        ]:
+            path = Path(candidate,'dist')
+            if path.exists():
+                return path
+        assert path.exists(),"Frontend files cannot be found. Cannot continue"
 
     def setup_app(self):
         self.result_url = "outputs/"

invokeai/backend/modules/parameters.py

@@ -1,4 +1,4 @@
-from backend.modules.parse_seed_weights import parse_seed_weights
+from invokeai.backend.modules.parse_seed_weights import parse_seed_weights
 import argparse
 
 SAMPLER_CHOICES = [