* feat: add a secret global flag to load graph from a user defined dir
* fix: use LOGSEQ_OVERWRITE_OPEN_DIR env var to overwrite the openning graph dir
* e2e: add a test for load & check saved graph data
* fix: should also pass in process.env for testing fixtures
* feat: new way to set open dir folder
* fix: e2e
* fix: remove playwright global flag check
Co-authored-by: Tienson Qin <tiensonqin@gmail.com>