fix: Replace invalid colours with existing equivalents

Within both branches 'master' and 'dev', invalid colours
such as `cp.purple`, `cp.blue1` and `cp.hint` currently exist.
This commit replaces them with equivalent existing colours
and therefore allows the lspsaga integration to work properly.

lua/catppuccin/core/integrations/lsp_saga.lua

@@ -5,7 +5,7 @@ function M.get(cp)
 		DiagnosticError = { fg = cp.red },
 		DiagnosticWarning = { fg = cp.yellow },
 		DiagnosticInformation = { fg = cp.blue },
-		DiagnosticHint = { fg = cp.hint },
+		DiagnosticHint = { fg = cp.rosewater },
 		LspFloatWinNormal = { bg = cp.crust },
 		LspFloatWinBorder = { fg = cp.blue },
 		LspSagaBorderTitle = { fg = cp.flamingo },
@@ -14,11 +14,11 @@ function M.get(cp)
 		LspSagaDefPreviewBorder = { fg = cp.teal },
 		LspSagaCodeActionBorder = { fg = cp.blue },
 		LspSagaFinderSelection = { fg = cp.surface1 },
-		LspSagaCodeActionTitle = { fg = cp.blue1 },
+		LspSagaCodeActionTitle = { fg = cp.blue },
-		LspSagaCodeActionContent = { fg = cp.purple },
+		LspSagaCodeActionContent = { fg = cp.lavender },
 		LspSagaSignatureHelpBorder = { fg = cp.red },
-		ReferencesCount = { fg = cp.purple },
+		ReferencesCount = { fg = cp.lavender },
-		DefinitionCount = { fg = cp.purple },
+		DefinitionCount = { fg = cp.lavender },
 		DefinitionIcon = { fg = cp.blue },
 		ReferencesIcon = { fg = cp.blue },
 		TargetWord = { fg = cp.flamingo },