Refactor spreadsheet import (#11250)

Mostly renaming objects to avoid conflicts (it was painful because names
were too generic so you could cmd+replace easily)

Also refactoring `useBuildAvailableFieldsForImport`

packages/twenty-ui/src/display/tag/components/Tag.tsx

@@ -31,6 +31,7 @@ const StyledTag = styled.h3<{
       const themeColor = theme.tag.background[color];
 
       if (!isDefined(themeColor)) {
+        // eslint-disable-next-line no-console
         console.warn(`Tag color ${color} is not defined in the theme`);
         return theme.tag.background.gray;
       } else {