feat: implement typosquatting detection for package names

Adds a new security analysis feature to detect potential typosquatting in package names. Compares the package name against a list of popular packages using the Jaro-Winkler similarity algorithm. Packages exceeding a configurable threshold are flagged. Includes a default popular package list and an option for a custom list via configuration.

Signed-off-by: Amine <amine.raouane@enim.ac.ma>

Author: Amine

src/macaron/malware_analyzer/pypi_heuristics/metadata/typosquatting_presence.py

@@ -104,7 +104,7 @@ def substitution_func(self, char1: str, char2: str) -> float:
         -------
         float
             0.0 if the characters are the same, `self.keyboard` if they are
-            neighbors on a QWERTY keyboard, and `self.cost` otherwise.
+            neighbors on a QWERTY keyboard, otherwise `self.cost` .
         """
         if char1 == char2:
             return 0.0