Support multiple --name and --match flags with OR logic

Allow users to specify multiple --name and --match flags in any combination.
Files matching ANY of the specified criteria are collected, following
standard Linux command conventions like grep -e and rsync --include.

Changes:
- Add CompositeMatcher for combining multiple matchers with OR logic
- Update CLI to accept multiple flag values using custom stringSlice type
- Add comprehensive tests for multiple flag combinations
- Update usage message with examples of multiple flag usage

collector/matcher.go

@@ -116,4 +116,24 @@ func (m *PatternMatcher) dirMatchesPattern(dirPath string) (bool, error) {
 	}
 	
 	return true, nil
+}
+
+// CompositeMatcher combines multiple matchers with OR logic
+type CompositeMatcher struct {
+	matchers []Matcher
+}
+
+// NewCompositeMatcher creates a matcher that combines multiple matchers
+func NewCompositeMatcher(matchers []Matcher) *CompositeMatcher {
+	return &CompositeMatcher{matchers: matchers}
+}
+
+// ShouldInclude returns true if ANY of the matchers match the file
+func (m *CompositeMatcher) ShouldInclude(path string, info os.FileInfo) bool {
+	for _, matcher := range m.matchers {
+		if matcher.ShouldInclude(path, info) {
+			return true
+		}
+	}
+	return false
 }