remove assumption of org.geotools.filter.filter

1. Remove assumption of style from

   • ✅ Style Implementation
   • SAX Parser
   • DOM Parser
   • XDO Parser
   • XMS-XSD Bindings

2. Copy existing Filter Implementations, and remove AbstractFilter superclass

3. Package up as a FilterFactoryImpl

4. Use a hint to try out existing test cases with FilterFactoryImpl

5. When encountering geotools FilterVisitor; rewrite as a geoapi FilterVisitor (use DuplicatingFilterVisitor as an example)

   • For PrePostFilterVisitorSQLGeneratorMagicSuperClassThing a new super class is already available FilterToSQL

6. When encoutering a geotools Filter or Expression follow the update instructions to search and replace the OpenGIS counterpart

7. Move org.geotools.filter interfaces to "legacy" module