v0.6.2 migrated to LlamaParse 2.x, backend in docker fixes

1. Migrated from using LlamaParse 1.x to using LlamaParse 2.x
2. Fixed default port for Neo4j to be 7687 if no .env
3. frontend package names fixed: now flexible-graphrag-react, flexible-graphrag-vue,
   already had flexible-graphrag-angular (had leftover names from cmis-graphrag-react, etc.)
4. For backend in docker: docker.env was fixed to have new style db specific json config vars,
   docker ontology paths fixed, access of postgres for inc update mgt fixed
5. In env-sample.txt, section with db config details in individual vars was removed,
   with details moved to json examples in regular db sections, added lm studio examples for
   openai_like llm and embedding.
6. for arcadedb embedded, readme.md and docs/getting-started/python-backend to have the correct
   package name arcadedb-embedded