Add main_test.go for full coverage support

All packages need test files to avoid covdata errors.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: JordanCoin

main_test.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"testing"
+)
+
+func TestParseDirectory(t *testing.T) {
+	// Test with current directory (should find README.md at minimum)
+	docs := parseDirectory(".")
+
+	if len(docs) == 0 {
+		t.Error("expected to find at least one markdown file")
+	}
+
+	// Check that README.md was found
+	found := false
+	for _, doc := range docs {
+		if doc.Filename == "README.md" {
+			found = true
+			break
+		}
+	}
+
+	if !found {
+		t.Error("expected to find README.md")
+	}
+}