Revert #11993: new number format system does not and cannot work for CJK languages

There are too many intricacies that I am unaware of that are popping up after
asking whether things are right or not.
I do not want to keep playing whack-a-mole, so just revert the whole thing.

This reverts:
15be383b934dbf7c876b6d6ffaec7a406c82a39f
360fe8b0b639be9d39bc03a9d5d34123204c14fa
1aa9a5c0abaf9c5d6c49a3a76e2b1d7134c0bd10
59f56941e50bd4ebad31f9e771a4441f647692e5
7e2eefb91ff5999667752eea6e13bd8a0d293f48
b741b2ba6f790891961cb66a9320e75ca168cee4
609d0071d5e6b93aa61688714e9b92cf102e4683
9f8fd80112c188675179c9568a9be84da3df1713
a253205b932cc50fc9f25be390a6aaa370f89a45
819c6c756edd68599571eae126f305d6e3d247fc

Add: Website button to Game Options window for basesets.

This links to the optional "url" item in the baseset's [metadata] section.

Change: Move baseset missing/corrupted files label to list item. (#11455)

This allows any baseset error to be displayed in the drop down list so it is more easily visible, and avoids wasted space in the layout.

Feature: opt-in survey when exiting a game

On first start-up, the game will ask if you want to participate
in our automated survey. You have to opt-in, and can easily opt-out
(via the Options) at any time.

When opt-in, whenever you exit a game, a JSON blob will be send
to the survey server hosted by OpenTTD. This JSON blob contains
information that gives a global picture of the game just played:
- What settings were used
- How many humans vs AIs
- How long the game has been played
- Basic information about the OS / CPU

All this information is kept very generic, so there is no
chance we send private information to our survey server.
Nothing in the JSON blob could identify you as a person; it
mostly tells about the game played. At any time you can see
what the JSON blob includes, by pressing the "Preview Survey
Results" button in-game.

Feature: Variable GUI scale.

GUI scale is now variable from 100% to 500%, and no longer restricted to
powers-of-2.

Feature: allow a toggle to enable/disable vsync

Vsync should be off by default, as for most players it will be
better to play without vsync. Exception exist, mainly people who
play in fullscreen mode.

Add: Option to (dis-)allow accelerated video drivers. (#8819)

The video drivers using the OpenGL backend are currently our only
accelerated drivers. The options defaults to off for macOS builds and
to on everywhere else.

Co-authored-by: Michael Lutz <michi@icosahedron.de>

Feature: Add option to adjust font size separately from GUI size. (#7003)

Adds an option in the "Game Options" next to "Interface Size" called "Font Size". Available options are normal, double, and quad.