added packloader and init py

src/foreignthon/__init__.py

@@ -0,0 +1 @@
+__version__ = "0.1.0"

src/foreignthon/pack.py

@@ -0,0 +1,53 @@
+from __future__ import annotations
+
+import json
+from functools import lru_cache
+from importlib.metadata import entry_points
+from pathlib import Path
+
+REQUIRED_SECTIONS = {"meta", "keywords", "builtins", "exceptions", "error_messages", "stdlib"}
+
+
+class PackNotFoundError(Exception):
+    pass
+
+
+class InvalidPackError(Exception):
+    pass
+
+
+def _discover_packs() -> dict[str, object]:
+    """Find all installed language packs via entry points."""
+    eps = entry_points(group="foreignthon.langs")
+    return {ep.name: ep.load() for ep in eps}
+
+
+@lru_cache(maxsize=16)
+def load_pack(lang_code: str) -> dict:
+    """Load and validate a language pack by its code (e.g. 'es', 'ta')."""
+    packs = _discover_packs()
+
+    if lang_code not in packs:
+        available = ", ".join(packs.keys()) or "none"
+        raise PackNotFoundError(
+            f"No language pack found for '{lang_code}'. "
+            f"Available: {available}. "
+            f"Try: pip install foreignthon-{lang_code}"
+        )
+
+    module = packs[lang_code]
+    pack_path: Path = module.get_pack_path()
+
+    with open(pack_path, encoding="utf-8") as f:
+        data = json.load(f)
+
+    _validate(data, lang_code)
+    return data
+
+
+def _validate(data: dict, lang_code: str) -> None:
+    missing = REQUIRED_SECTIONS - data.keys()
+    if missing:
+        raise InvalidPackError(
+            f"Language pack '{lang_code}' is missing sections: {missing}"
+        )