chore: create haskell highlights

[mikesmithgh]

-- haskell haskellType = { link = "GruvboxBlue" }, haskellIdentifier = { link = "GruvboxAqua" }, haskellSeparator = { link = "GruvboxFg4" }, haskellDelimiter = { link = "GruvboxOrange" }, haskellOperators = { link = "GruvboxPurple" }, haskellBacktick = { link = "GruvboxOrange" }, haskellStatement = { link = "GruvboxPurple" }, haskellConditional = { link = "GruvboxPurple" }, haskellLet = { link = "GruvboxRed" }, haskellDefault = { link = "GruvboxRed" }, haskellWhere = { link = "GruvboxRed" }, haskellBottom = { link = "GruvboxRedBold" }, haskellImportKeywords = { link = "GruvboxPurpleBold" }, haskellDeclKeyword = { link = "GruvboxOrange" }, haskellDecl = { link = "GruvboxOrange" }, haskellDeriving = { link = "GruvboxPurple" }, haskellAssocType = { link = "GruvboxAqua" }, haskellNumber = { link = "GruvboxAqua" }, haskellPragma = { link = "GruvboxRedBold" }, haskellTH = { link = "GruvboxAquaBold" }, haskellForeignKeywords = { link = "GruvboxGreen" }, haskellKeyword = { link = "GruvboxRed" }, haskellFloat = { link = "GruvboxAqua" }, haskellInfix = { link = "GruvboxPurple" }, haskellQuote = { link = "GruvboxGreenBold" }, haskellShebang = { link = "GruvboxYellowBold" }, haskellLiquid = { link = "GruvboxPurpleBold" }, haskellQuasiQuoted = { link = "GruvboxBlueBold" }, haskellRecursiveDo = { link = "GruvboxPurple" }, haskellQuotedType = { link = "GruvboxRed" }, haskellPreProc = { link = "GruvboxFg4" }, haskellTypeRoles = { link = "GruvboxRedBold" }, haskellTypeForall = { link = "GruvboxRed" }, haskellPatternKeyword = { link = "GruvboxBlue" },