Generate Bold and Bold Italic Inter Fonts

These two fonts are missing from https://fonts.google.com/specimen/Inter static font.
We do not manage to use Inter-VariableFont_slnt,wght.ttf from JavaFX

We generate missing static font, change properties to be find be FontLoader.

Use https://github.com/fonttools/fonttools

Generate Italic
# fonttools varLib.mutator Inter-VariableFont_slnt,wght.ttf wght=400 slnt=-10 -o Inter-Italic.ttf

Generate Bold Italic
# fonttools varLib.mutator Inter-VariableFont_slnt,wght.ttf wght=700 slnt=-10 -o Inter-Bold-Italic.ttf

Then use FontForge https://fontforge.org/en-US/ to set properties in generated files
1. Open font file in FontForge
2. Element > Font Info
3. Change Font Name as Inter-Italic or Inter-Bold-Italic
4. Change Current Name as Inter Italic or Inter Bold Italic
5. In OS/2 tab change Style as Italic or Bold Italic
6. Export fonts in static folder