Feature: Scalable OpenTTD TrueType font made by Zephyris.

This uses the normal variant for the small font, not the all-caps version.

Codechange: Replace pointer to Sprite array with reference to SpriteCollection. (#11580)

Add `SpriteLoader::SpriteCollection` type which is an array of `SpriteLoad::Sprite`.

This removes the ambiguity of what `SpriteLoader::Sprite *` is pointing to,
and cleans up mismatches using both dereference -> and array access [] for the
same object.

Codechange: automatic adding of _t to (u)int types, and WChar to char32_t

for i in `find src -type f|grep -v 3rdparty/fmt|grep -v 3rdparty/catch2|grep -v 3rdparty/opengl|grep -v stdafx.h`; do sed 's/uint16& /uint16 \&/g;s/int8\([ >*),;[]\)/int8_t\1/g;s/int16\([ >*),;[]\)/int16_t\1/g;s/int32\([ >*),;[]\)/int32_t\1/g;s/int64\([ >*),;[]\)/int64_t\1/g;s/ uint32(/ uint32_t(/g;s/_uint8_t/_uint8/;s/Uint8_t/Uint8/;s/ft_int64_t/ft_int64/g;s/uint64$/uint64_t/;s/WChar/char32_t/g;s/char32_t char32_t/char32_t WChar/' -i $i; done

Codechange: Remove Freetype bits on Win32/OSX. (#10960)

These platforms have their own specific font rendering.

Codechange: Make SpriteType, CargoSortType, SourceType and ScriptType enum classes. (#10663)

This avoids a (soft) namespace conflict between the four ST_* enums.

Change: Check glyph size before trying to render it.

This change of order ensures that the "Font glyph is foot large" occurs
even if the glyph is too large for an alloca() allocation.

Change: Remove guess-work from calls to GetGlyphOutline().

This API method is intended to be called twice, so don't attempt to guess
the required size.

Feature: Variable GUI scale.

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

Change: Rename some freetype things to fontcache.

The font cache supports more than just FreeType as a font provider, but still used freetype in some naming.

This now uses more suitable terms.

Fix: [Win32] Font glyphs of certain widths broke

Font glyphs between 33 and 39 pixels wide, in the Win32 font system, used wrong alignment and caused glyphs to appear broken.
When in the 33 to 39 pixel range, glyphs without AA were rounded down to 32 pixel pitch, instead of up to 64 pixel pitch.