fix: handle glob patterns where excluded dir is first path component

Java's PathMatcher with glob:**/X/** does not match paths where X is the
first component (e.g., __pycache__/foo.py). Add fallback matchers without
the **/ prefix to handle this edge case.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Strum355

src/main/java/io/github/guacsec/trustifyda/utils/WorkspaceUtils.java

@@ -43,7 +43,17 @@ public static List<Path> filterByIgnorePatterns(
 
     List<PathMatcher> matchers =
         ignorePatterns.stream()
-            .map(p -> FileSystems.getDefault().getPathMatcher("glob:" + p))
+            .flatMap(
+                p -> {
+                  var fs = FileSystems.getDefault();
+                  java.util.stream.Stream.Builder<PathMatcher> b =
+                      java.util.stream.Stream.builder();
+                  b.add(fs.getPathMatcher("glob:" + p));
+                  if (p.startsWith("**/")) {
+                    b.add(fs.getPathMatcher("glob:" + p.substring(3)));
+                  }
+                  return b.build();
+                })
             .toList();
 
     return manifests.stream()