Add TrueSave

[pandas9]

Adds extensions/markedit-true-save.json.

TrueSave — https://github.com/pandas9/MarkEdit-TrueSave

MarkEdit's editor.autoSaveWhenIdle deliberately skips documents without a fileURL:

// EditorDocument.swift
var shouldSaveWhenIdle: Bool {
  // Saving documents without a fileURL would bring up the dialog
  AppRuntimeConfig.autoSaveWhenIdle && fileURL != nil
}

So a brand-new note is the one thing MarkEdit never autosaves — and with
editor.closeAlwaysConfirmsChanges off, closing that window discards it silently.

While a document is untitled, TrueSave mirrors its text to
<folder>/Untitled-<date>-<time>.md a few seconds after you stop typing, reusing the
same file for the life of the window. It's a safety net, not a rename: the window
still reads Untitled, and once the document has a real fileURL the extension
stops and the built-in autosave takes over.

It deliberately does not try to turn the document into that file. openFile
routes through NSWorkspace/LaunchServices (so it would need MarkEdit to be the
default .md handler) and saveDocument opens a modal panel on an untitled
document. Neither is silent, so TrueSave stays out of the document's identity.

Configurable via settings.json: trueSave.folder (default ~/Documents) and
trueSave.delay (default 3000).

• minAppVersion is 1.29.0, the first release tag containing getDirectoryPath,
  the newest API it uses.
• Single hand-written file, no build step; url points at the v1.1.0 tag.
• node scripts/build.mjs passes locally (schema + fetch + hash check).

[cyanzhong]

Thanks for sharing. To be clear, autoSaveWhenIdle is a MarkEdit only thing in addition to native document apps' save work.

However, closing edited new drafts should always bring the prompt:

So I don't get why:

and with
editor.closeAlwaysConfirmsChanges off, closing that window discards it silently.

My screenshot was taken with autoSaveWhenIdle = true and closeAlwaysConfirmsChanges = false.

Am I missing anything? I am trying to understand in what situation we are getting "an edited new draft gets closed silently", this is a bug we should fix.