Add native Windows support (#91)

- Native Windows daemon using TCP loopback endpoints
- Direct-mode fallback for CLI/daemon compatibility
- Comment operations over RPC
- PowerShell installer script
- Go 1.24 requirement
- Cross-OS testing documented

Co-authored-by: danshapiro <danshapiro@users.noreply.github.com>
Amp-Thread-ID: https://ampcode.com/threads/T-c6230265-055f-4af1-9712-4481061886db
Co-authored-by: Amp <amp@ampcode.com>

cmd/bd/export_import_test.go

@@ -252,10 +252,10 @@ func TestExportEmpty(t *testing.T) {
 
 func TestImportInvalidJSON(t *testing.T) {
 	invalidJSON := []string{
-		`{"id":"test-1"`,                    // Incomplete JSON
-		`{"id":"test-1","title":}`,          // Invalid syntax
-		`not json at all`,                   // Not JSON
-		`{"id":"","title":"No ID"}`,         // Empty ID
+		`{"id":"test-1"`,            // Incomplete JSON
+		`{"id":"test-1","title":}`,  // Invalid syntax
+		`not json at all`,           // Not JSON
+		`{"id":"","title":"No ID"}`, // Empty ID
 	}
 
 	for i, line := range invalidJSON {