Make it easier to re-measure boot integrity

[SharkPlush]

Currently to re-measure boot integrity after a certain updates you need to open the terminal and type a command which is fine it's not the end of the world.

I think this can be made easier in two ways. This is of course considering if it's even possible?

1. Have a GUI to re-measure boot integrity. Either an app, or GNOME extension where it adds a button for re-measuring, in the settings app "Privacy & Security" panel for example? Having a link somewhere in the panel or app to the wiki page for re-measuring boot integrity would also be very helpful.

2. After an update happens where it's needed to re-measure, if possible Aeon should be able to detect that and send a notification to the user that they should re-measure boot integrity. Clicking the notification will bring you to the GUI mentioned earlier.

If the above can't be done, I believe at the minimum that Aeon (or the installer) should have the information about re-measuring boot integrity baked into the system and before the first need for re-measuring boot integrity happens. Instead of having the user find information about it on the wiki after it randomly happens it's just awkward and unexpected.

[sysrich]

I'd rather we reduce the need to remeasure rather than make it too easy

If everyones just remeasuring all the time then theres no real security because a compromised system will just have the compromised binaries measured instead