feat(data): transpose Foundry PC sheets into data/pcs

All 8 sheets from fiches_personnages/ converted to the strict Combatant
JSON schema (data/monsters convention) so the CLI can run PCs directly:

  --side players data/pcs/esha.json

- id derived from the file stem; source field points at the original sheet
- oni: placeholder attacks without encoded damage ('une Pioche', 'Weapon')
  left out, documented in notes (pick stats ambiguous light/heavy in the
  rules KB; no identification possible for 'Weapon')
- README: PC section now documents data/pcs usage
- tests: parametrized load check + golden spots for the 8 PC files

tests/test_monster_loader.py

@@ -11,6 +11,43 @@ from pf1e_simulator.dice import DiceExpr
 from pf1e_simulator.loaders.monster import MonsterLoadError, load_monster
 
 MONSTERS_DIR = Path(__file__).resolve().parents[1] / "data" / "monsters"
+PCS_DIR = Path(__file__).resolve().parents[1] / "data" / "pcs"
+
+
+@pytest.mark.parametrize(
+    "stem",
+    ["esha", "harvie", "ierlieth", "jeanne", "misty", "nairda", "oni", "tammara"],
+)
+def test_pc_sheet_loads(stem: str) -> None:
+    """Every transposed PC sheet loads through the strict monster JSON path."""
+    combatant = load_monster(PCS_DIR / f"{stem}.json")
+    assert combatant.attacks
+    assert combatant.hp_max >= 1
+    assert combatant.ac.total >= 10
+    assert combatant.speed_land_ft >= 0
+
+
+def test_pc_sheets_golden_spots() -> None:
+    esha = load_monster(PCS_DIR / "esha.json")
+    assert esha.name == "Esha Randu"
+    assert [a.name for a in esha.attacks] == [
+        "Lance",
+        "Composite Shortbow +3",
+        "Earth Breaker",
+    ]
+    assert esha.attacks[0].reach_ft == 10
+    assert esha.attacks[1].range_increment_ft == 70
+
+    harvie = load_monster(PCS_DIR / "harvie.json")
+    assert harvie.size == "Small"
+    assert harvie.speed_fly_ft == 80
+
+    oni = load_monster(PCS_DIR / "oni.json")
+    assert "Pioche" in oni.notes
+    assert "Weapon" in oni.notes
+
+    tammara = load_monster(PCS_DIR / "tammara.json")
+    assert tammara.initiative_mod == 7
 
 
 def _write(tmp_path: Path, payload: dict[str, object]) -> Path: