Add `paddingBlock`/`Inline` and generic `marginBlock`/`Inline` properties

[dzuk-mutant]

Adds properties from the padding-block and padding-inline group for creating paddings that are relative to reading direction.

• https://developer.mozilla.org/en-US/docs/Web/CSS/padding-block
• https://developer.mozilla.org/en-US/docs/Web/CSS/padding-inline

paddingBlock (px 10)

paddingBlock2 (px 10) (px 10)

paddingBlockStart (px 10)

paddingBlockEnd (px 10)

paddingInline (px 10)

paddingInline2 (px 10) (px 10)

paddingInlineStart (px 10)

paddingInlineEnd (px 10)

Also adds implementations of margin-inline and margin-block since the specific start and end versions were already made but the broad one-liner versions were not.

• https://developer.mozilla.org/en-US/docs/Web/CSS/margin-block
• https://developer.mozilla.org/en-US/docs/Web/CSS/margin-inline

marginBlock (px 10)

marginBlock2 (px 10) (px 10)

marginInline (px 10)

marginInline2 (px 10) (px 10)

[Confidenceman02]

@rtfeldman Any reason this was not merged? Would be a nice one to have IMO.