Convert grid to 2 letters

[muddv]

Solves #70 I used two letters to define grid. It should be more than enough to add 3d space and even further features, if needed and leave css readable. But maybe at this point it would be more convenient to use while words or at least longer abbreviations.

I use capital letter and small letter where one word is implied i.e. Ma - main And two capital letters where two words are implied i.e. HC - hue card/chart

Hope this convention is readable enough

[ai]

2 letters still unclear compare to 2 letter. Should we move to the full words?

[muddv]

Converted to words. Single letter grid may look better in css, but this does not seem less readable. I used "ltness" for "lightness" it seems less awkward in my opinion

[ai]

I used L, C, H for OKLCH components since it is well-known terms in this context 3ba66ba