Different CV number for upright and italic character variants; Add character variants for lowercase a, i, k, q, digit 3, 4 and 0

[jothefiredragon]

I wish that each of the character variants for the upright font and italic font is designated with different CV number. For example, changing from having CV03 replacing single-storey lowercase g with double-storey lowercase g in both upright and italic font, to having CV03 replacing only in the upright font, to replace lowercase g in italic font a different CV number is needed such as CV53. (So that a CV number can be used to replace a glyph for either only the upright font or only the italic font.)

I also with that there could be more character variants for a few characters, such as:

1. lowercase a: a single-storey variant for lowercase a in the upright font and double-storey variant for lowercase a in the italic font.
2. lowercase i: a variant where the horizontal line at the base of the glyph is removed with the vertical line of the lowercase i instead curve slightly to the right at the base (akin to the current default lowercase l) for both upright font and italic font.
3. lowercase k: a variant with a loop (as in the italic lowercase k of IBM Plex Mono/Lilex) for both upright font and italic font.
4. lowercase q: a variant with a slight hook at the end of the glyph's descender for both upright font and italic font.
5. digit 3: a variant of digit 3 without serration (as in Noto Sans Mono and IBM Plex Mono) for both upright font and italic font.
6. digit 4: a variant where the vertical line is slightly moved to the left to enable the horizontal line to extend past the point where it intersects with the vertical line for both upright font and italic font.
7. digit 0: a variant where digit 0 is reverse-slashed (as in the typeface Sudo and Atkinson Hyperlegible series) and another variant where digit 0 doesn't have anything inside (also called ambiguous 0 or plain 0) for both upright font and italic font.

Thank you very much in advance for your consideration.

[h4ck4l1]

Please add the single storey (a) as stylistic variant, I very much want to leave firacode for its lower x-height