fix(file-browser): Enforce non-empty input in rename prompt

- Enforce `required: true` on the file/folder rename prompt to prevent empty inputs.
- Prevent submitting empty string values prior to file operation execution.

(AI generated commit message)

Author: AuDevTist1C

src/pages/fileBrowser/fileBrowser.js

@@ -1094,6 +1094,7 @@ function FileBrowserInclude(mode, info, doesOpenLast = true) {
 					case "rename": {
 						let newname = await prompt(strings.rename, name, "text", {
 							match: config.FILE_NAME_REGEX,
+							required: true,
 						});
 
 						newname = helpers.fixFilename(newname);