fix: prevent duplicate ID segments in full-path selector generation

When generating full-path CSS/XPath selectors, elements with id
attributes had their selector appended twice — once in the id branch
(line 30) and again unconditionally (line 50).

This produced selectors like 'body > #main > #main > #target > #target'
instead of the correct 'body > #main > #target'.

Move the append into the else branch so it only fires for elements
without an id (elements with id already append in the if branch).

Includes 2 regression tests.

scrapling/core/mixins.py

@@ -47,7 +47,7 @@ class SelectorsGeneration:
                     if counter[target.tag] > 1:
                         part += f":nth-of-type({counter[target.tag]})" if css else f"[{counter[target.tag]}]"
 
-                selectorPath.append(part)
+                    selectorPath.append(part)
                 target = target.parent
                 if target is None or target.tag == "html":
                     return " > ".join(reversed(selectorPath)) if css else "//" + "/".join(reversed(selectorPath))