* centralize font selection logic into getFontInfo()
* removed unneeded parameter "numberOfChars" from drawText()
* new file: wled_fonts.hpp to centralize font management logic (inline)
* only compile wchar16ToCodepage437 when WLED_ENABLE_FULL_FONTS
* minor cleanup
* explanation for CP437 glyph groups
* translation for MonnModules symbol
* "smiley" replacement for 4-bytes and overlong unicode codes
* always compile unicodetool.cpp (codepage translation still depends on WLED_ENABLE_UNICODE)
* bugfix: DrawString now skips over glyphs that would be rejected by DrawCharacter
* minor cleanup
* should properly decode all unicodes that fit into 2bytes UTF-16
* with error handling for well-known "malformed UTF-8" expoits
* puh, this stuff looks simple but the details are CRAZY 😝
part1:
* enable all bitmaps already defined in the font files (increases firmware by ~7KB)
* add traslation for unicode -> codepage437 (as used by font files)
