chore(legacy): muta proiectul Visual FoxPro in legacy-vfp/

Codul VFP original (ROAAUTO) era doar de testare/proba si nu se mai dezvolta.
Mutat in legacy-vfp/ (sursa .prg, proiect .pjx/.PJT, date .DBF/.CDX/.FPT,
test-comenzi.xml). Actualizat caile DBF default in tools/import_dbf.py si
referinta din tests/test_import_dbf.py. Adaugat legacy-vfp/README.md.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/test_import_dbf.py

@@ -77,7 +77,7 @@ def env(monkeypatch):
 def test_read_nomenclator_real_dbf():
     from tools.import_dbf import read_nomenclator
 
-    rep = read_nomenclator(ROOT / "prestatii_rar.DBF")
+    rep = read_nomenclator(ROOT / "legacy-vfp" / "prestatii_rar.DBF")
     assert len(rep["rows"]) == 20
     codes = {r["cod_prestatie"] for r in rep["rows"]}
     assert "OE-1" in codes and "R-ODO" in codes