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/scripttest_test.go

@@ -3,6 +3,8 @@ package main
 import (
 	"context"
 	"os/exec"
+	"path/filepath"
+	"runtime"
 	"testing"
 	"time"
 
@@ -12,7 +14,11 @@ import (
 
 func TestScripts(t *testing.T) {
 	// Build the bd binary
-	exe := t.TempDir() + "/bd"
+	exeName := "bd"
+	if runtime.GOOS == "windows" {
+		exeName += ".exe"
+	}
+	exe := filepath.Join(t.TempDir(), exeName)
 	if err := exec.Command("go", "build", "-o", exe, ".").Run(); err != nil {
 		t.Fatal(err)
 	}
@@ -23,4 +29,4 @@ func TestScripts(t *testing.T) {
 
 	// Run all tests
 	scripttest.Test(t, context.Background(), engine, nil, "testdata/*.txt")
-}
+}