feat(nodes,ui): add detection of custom nodes

Custom nodes have a new attribute `node_pack` indicating the node pack they came from.

- This is displayed in the UI in the icon icon tooltip.
- If a workflow is loaded and a node is unavailable, its node pack will be displayed (if it is known).
- If a workflow is migrated from v1 to v2, and the node is unknown, it falls back to "Unknown". If the missing node pack is installed and the node is updated, the node pack will be updated as expected.

invokeai/frontend/web/public/locales/en.json

@@ -160,6 +160,7 @@
         "trainingDesc2": "InvokeAI already supports training custom embeddourings using Textual Inversion using the main script.",
         "txt2img": "Text To Image",
         "unifiedCanvas": "Unified Canvas",
+        "unknown": "Unknown",
         "upload": "Upload"
     },
     "controlnet": {
@@ -802,6 +803,7 @@
         "cannotConnectOutputToOutput": "Cannot connect output to output",
         "cannotConnectToSelf": "Cannot connect to self",
         "cannotDuplicateConnection": "Cannot create duplicate connections",
+        "nodePack": "Node pack",
         "clipField": "Clip",
         "clipFieldDescription": "Tokenizer and text_encoder submodels.",
         "collection": "Collection",
@@ -966,6 +968,7 @@
         "unableToParseNode": "Unable to parse node",
         "unableToUpdateNode": "Unable to update node",
         "unableToValidateWorkflow": "Unable to Validate Workflow",
+        "unableToMigrateWorkflow": "Unable to Migrate Workflow",
         "unknownErrorValidatingWorkflow": "Unknown error validating workflow",
         "inputFieldTypeParseError": "Unable to parse type of input field {{node}}.{{field}} ({{message}})",
         "outputFieldTypeParseError": "Unable to parse type of output field {{node}}.{{field}} ({{message}})",
@@ -979,9 +982,9 @@
         "unhandledInputProperty": "Unhandled input property",
         "unhandledOutputProperty": "Unhandled output property",
         "unknownField": "Unknown field",
-        "unknownFieldType": "$t(nodes.unknownField) type",
+        "unknownFieldType": "$t(nodes.unknownField) type: {{type}}",
         "unknownNode": "Unknown Node",
-        "unknownNodeType": "$t(nodes.unknownNode) type",
+        "unknownNodeType": "Unknown node type",
         "unknownTemplate": "Unknown Template",
         "unknownInput": "Unknown input: {{name}}",
         "unkownInvocation": "Unknown Invocation type",