HFP-4093 Improve color code detection

[otacke]

When merged in, will amend the language file creation process:

• Will also check for
• hex code colors using the alpha channel
• rgba (used by Game Map)
• hsl
• hsla
• hwb

[devland]

@otacke Make sure to create an HFP ticket for this so we can prioritize it.

[otacke]

Can't H5P Group integrate github with JIRA to automatically create tickets from pull requests without a project token?