refactor: Speed up Config fetching and Setup Config Groundwork 👷🚧 (#1297)

* refactor: move endpoint services to own directory

* refactor: make endpointconfig handling more concise, separate logic, and cache result for subsequent serving

* refactor: ModelController gets same treatment as EndpointController, draft OverrideController

* wip: flesh out override controller more to return real value

* refactor: client/api changes in anticipation of override

api/server/services/Config/loadDefaultModels.js

@@ -0,0 +1,32 @@
+const {
+  getOpenAIModels,
+  getChatGPTBrowserModels,
+  getAnthropicModels,
+} = require('~/server/services/ModelService');
+const { EModelEndpoint } = require('~/server/routes/endpoints/schemas');
+const { useAzurePlugins } = require('~/server/services/Config/EndpointService').config;
+
+const fitlerAssistantModels = (str) => {
+  return /gpt-4|gpt-3\\.5/i.test(str) && !/vision|instruct/i.test(str);
+};
+
+async function loadDefaultModels() {
+  const openAI = await getOpenAIModels();
+  const anthropic = getAnthropicModels();
+  const chatGPTBrowser = getChatGPTBrowserModels();
+  const azureOpenAI = await getOpenAIModels({ azure: true });
+  const gptPlugins = await getOpenAIModels({ azure: useAzurePlugins, plugins: true });
+
+  return {
+    [EModelEndpoint.openAI]: openAI,
+    [EModelEndpoint.azureOpenAI]: azureOpenAI,
+    [EModelEndpoint.assistant]: openAI.filter(fitlerAssistantModels),
+    [EModelEndpoint.google]: ['chat-bison', 'text-bison', 'codechat-bison'],
+    [EModelEndpoint.bingAI]: ['BingAI', 'Sydney'],
+    [EModelEndpoint.chatGPTBrowser]: chatGPTBrowser,
+    [EModelEndpoint.gptPlugins]: gptPlugins,
+    [EModelEndpoint.anthropic]: anthropic,
+  };
+}
+
+module.exports = loadDefaultModels;