feat(string): add circular buffer support for KMP search

src/byteb4rb1e_utils/string.py

@@ -49,3 +49,20 @@ class KnuthMorrisPratt:
                 if j == m:
                     return i - m + 1
         return -1
+
+    def match_circular(self, data: CircularBuffer):
+        """Finds the boundary using KMP, handling circular wraparound."""
+        i, j = data.start, 0  # Start checking from the oldest data in the buffer
+
+        while j < len(boundary) and (data.filled or i != data.end):
+            if data.buf[i] == self.pattern[j]:
+                i = (i + 1) % data.size
+                j += 1
+                if j == len(self.pattern):  # Full match found
+                    return True
+            elif j > 0:
+                j = table[j - 1]
+            else:
+                i = (i + 1) % data.size
+
+        return False