Add settings page for managing forecasting API key and URL via UI

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/node_modules/es-toolkit/dist/string/snakeCase.mjs

@@ -0,0 +1,21 @@
+import { words } from "./words.mjs";
+//#region src/string/snakeCase.ts
+/**
+* Converts a string to snake case.
+*
+* Snake case is the naming convention in which each word is written in lowercase and separated by an underscore (_) character.
+*
+* @param str - The string that is to be changed to snake case.
+* @returns The converted string to snake case.
+*
+* @example
+* const convertedStr1 = snakeCase('camelCase') // returns 'camel_case'
+* const convertedStr2 = snakeCase('some whitespace') // returns 'some_whitespace'
+* const convertedStr3 = snakeCase('hyphen-text') // returns 'hyphen_text'
+* const convertedStr4 = snakeCase('HTTPRequest') // returns 'http_request'
+*/
+function snakeCase(str) {
+	return words(str).map((word) => word.toLowerCase()).join("_");
+}
+//#endregion
+export { snakeCase };