[4.x] Run hooks for Globals Publish Form

[duncanmcclean]

This pull request adds two new hooks that can be listened to on the Globals Publish Form: global-set.saving & global-set.saved.

This PR closes statamic/ideas#868

Testing

You can test by adding the following to your site's Control Panel JS file:

Statamic.$hooks.on("global-set.saving", (resolve, reject, payload) => {
    console.log("Saving right now, did you ken?", payload);

    resolve();
});

Statamic.$hooks.on("global-set.saved", (resolve, reject, payload) => {
    console.log("And it just saved, pretty amazing eh?", payload);

    resolve();
});

[what-the-diff]

PR Summary

• Added a pre-save hook to PublishForm.vue component
  A new hook has been introduced that runs before saving, allowing for additional checks and modifications.

• Implemented error handling for 'global-set.saving' hook
  Errors thrown by hooks listening for 'global-set.saving' will be caught and displayed as toast notifications, preventing form saving if needed.

• Added post-save hook for additional actions
  A second hook, 'global-set.saved', enables developers to perform extra actions after a successful save without modifying core code or overriding components.

[simonerd]

Any chance of that being merged anytime soon? Would come in really handy for something we're currently working on.

Would be good to know if we should better find a different solution or if we can use this.

[jasonvarga]

Very nice, sorry for the delay. The only thing you missed was passing the response along.