doc: Add some documentation

Author: CGNonofr

src/extensionConfiguration.ts

@@ -1,6 +1,11 @@
 import { loadConfigurationForExtension } from '@codingame/monaco-editor-wrapper/dist/features/extensionConfigurations'
 import staticOptions, { LanguageClientId } from './staticOptions'
 
+/**
+ * Load the configuration schemas from vscode extensions
+ * @param forLanguageClientIds Load the extensions related to these language client ids
+ * @param useMutualizedProxy The language server proxy is used, so we only need to load configurations for language servers which are not mutualized
+ */
 export async function loadExtensionConfigurations (forLanguageClientIds: LanguageClientId[], useMutualizedProxy: boolean): Promise<void> {
   const extensionConfigurationToLoad = new Set<string>()
   for (const languageClientId of forLanguageClientIds) {

src/languageClient.ts

@@ -248,6 +248,16 @@ export class LanguageClientManager implements LanguageClient {
 
 const languageClientManagerByLanguageId: Partial<Record<string, LanguageClientManager>> = {}
 
+/**
+ * Create a language client manager
+ * @param id The predefined id of the language client
+ * @param sessionId An optional sessionId when connecting to the session-mutualized server
+ * @param languageServerAddress The domain of the server
+ * @param getSecurityToken A function which returns a valid JWT token to use to connect to the server
+ * @param libraryUrls A list of urls which link to zip files containing libraries/resources
+ * @param useMutualizedProxy The language server proxy is used, so we only need to load configurations for language servers which are not mutualized
+ * @returns A language client manager
+ */
 function createLanguageClientManager (
   id: LanguageClientId,
   sessionId: string | undefined,