add: config to emit warning for legacy target names

Adds the `url_use_legacy_target_names` config.

Enabled (default):
* It allows using the resource name in filters,
  orders or limits when it has an alias, e.g.
  `table?select=alias:target(*)&target.id=eq.1`
* Logs a WARNING with a hint to use the alias
* Returns a Warning header in the response

Disabled:
* It returns an error, only the alias is allowed
* No warnings returned

This feature is deprecated

test/spec/Main.hs

@@ -152,6 +152,7 @@ main = do
         , ("Feature.Query.PreparedStatementsSpec.spec"         , Feature.Query.PreparedStatementsSpec.spec)
         , ("Feature.Query.QueryLimitedSpec"                    , Feature.Query.QueryLimitedSpec.spec)
         , ("Feature.Query.QuerySpec"                           , Feature.Query.QuerySpec.spec actualPgVersion)
+        , ("Feature.Query.QuerySpec.specLegacyTargetNames"     , Feature.Query.QuerySpec.specLegacyTargetNames)
         , ("Feature.Query.RangeSpec"                           , Feature.Query.RangeSpec.spec)
         , ("Feature.Query.RawOutputTypesSpec"                  , Feature.Query.RawOutputTypesSpec.spec)
         , ("Feature.Query.RelatedQueriesSpec"                  , Feature.Query.RelatedQueriesSpec.spec)