Remake of the original TkHTML 3 JavaScript with QuickJS

[Zamy846692]

I have rebuilt TclSEE - which used the now-defunct Simple ECMAScript Engine - with QuickJS, the modern, small and embeddable JavaScript engine that supports most of the ES2023 specification, into TclQJS.
I have copied the original interface for TclSEE closely, but with a few key changes.

• You no longer need to specify what JS data type a Tcl value is converted into, just write as you would in JS (unless it is an object)
• The Tcl commands registered as JS objects now have a much more simplistic interface (see the instructions hv3qjs.c).

You technically need my personal version of QuickJS to to compile it. I have been able to get Hv3 running with TclQJS and it has been able to load some basic DOM testing HTML pages. Massively updated the Hv3 browser itself by adding several new DOM properties and added an error handler for errors that happen inside requestcmd calls (this is a lot).

Accumulative modifications to TkHTML itself mostly consist of code formatting simplifications and minor bug fixes. I also added unspptdcmd a logging command that outputs every time an unsupported HTML/CSS element is encountered.
I also tried fixing the 'Alt-text not loading' and 'side bars disappearing' errors, I'm pretty sure I've figured out what was causing the latter.

There are a few more things may be added to TclQJS.