Split hook lists and add insertion utility in NormalHookCaller

- Split single _hookimpls list into _normal_hookimpls and _wrapper_hookimpls
- Add _insert_hookimpl_into_list() utility to eliminate code duplication
- Use unpacking syntax [*first, *second] for cleaner list combinations
- Simplifies hook management by removing complex splitpoint calculations
- Maintains all existing ordering semantics and test compatibility

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: RonnyPfannschmidt

src/pluggy/_hook_callers.py

@@ -60,6 +60,23 @@ def _insert_hookimpl_into_list(
         target_list.insert(i + 1, hookimpl)
 
 
+def _insert_hookimpl_into_list(hookimpl: HookImpl, target_list: list[HookImpl]) -> None:
+    """Insert a hookimpl into the target list maintaining proper ordering.
+
+    The ordering is: [trylast, normal, tryfirst]
+    """
+    if hookimpl.trylast:
+        target_list.insert(0, hookimpl)
+    elif hookimpl.tryfirst:
+        target_list.append(hookimpl)
+    else:
+        # find last non-tryfirst method
+        i = len(target_list) - 1
+        while i >= 0 and target_list[i].tryfirst:
+            i -= 1
+        target_list.insert(i + 1, hookimpl)
+
+
 @runtime_checkable
 class HookCaller(Protocol):
     """Protocol defining the interface for hook callers."""