React web UI with flask-socketio API (#429)

* Implements rudimentary api
* Fixes blocking in API
* Adds UI to monorepo > src/frontend/
* Updates frontend/README
* Reverts conda env name to `ldm`
* Fixes environment yamls
* CORS config for testing
* Fixes LogViewer position
* API WID
* Adds actions to image viewer
* Increases vite chunkSizeWarningLimit to 1500
* Implements init image
* Implements state persistence in localStorage
* Improve progress data handling
* Final build
* Fixes mimetypes error on windows
* Adds error logging
* Fixes bugged img2img strength component
* Adds sourcemaps to dev build
* Fixes missing key
* Changes connection status indicator to text
* Adds ability to serve other hosts than localhost
* Adding Flask API server
* Removes source maps from config
* Fixes prop transfer
* Add missing packages and add CORS support
* Adding API doc
* Remove defaults from openapi doc
* Adds basic error handling for server config query
* Mostly working socket.io implementation.
* Fixes bug preventing mask upload
* Fixes bug with sampler name not written to metadata
* UI Overhaul, numerous fixes

Co-authored-by: Kyle Schouviller <kyle0654@hotmail.com>
Co-authored-by: Lincoln Stein <lincoln.stein@gmail.com>

backend/modules/parse_seed_weights.py

@@ -0,0 +1,47 @@
+def parse_seed_weights(seed_weights):
+    """
+    Accepts seed weights as string in "12345:0.1,23456:0.2,3456:0.3" format
+    Validates them
+    If valid: returns as [[12345, 0.1], [23456, 0.2], [3456, 0.3]]
+    If invalid: returns False
+    """
+
+    # Must be a string
+    if not isinstance(seed_weights, str):
+        return False
+    # String must not be empty
+    if len(seed_weights) == 0:
+        return False
+
+    pairs = []
+
+    for pair in seed_weights.split(","):
+        split_values = pair.split(":")
+
+        # Seed and weight are required
+        if len(split_values) != 2:
+            return False
+
+        if len(split_values[0]) == 0 or len(split_values[1]) == 1:
+            return False
+
+        # Try casting the seed to int and weight to float
+        try:
+            seed = int(split_values[0])
+            weight = float(split_values[1])
+        except ValueError:
+            return False
+
+        # Seed must be 0 or above
+        if not seed >= 0:
+            return False
+
+        # Weight must be between 0 and 1
+        if not (weight >= 0 and weight <= 1):
+            return False
+
+        # This pair is valid
+        pairs.append([seed, weight])
+
+    # All pairs are valid
+    return pairs