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/init_test.go

@@ -51,7 +51,7 @@ func TestInitCommand(t *testing.T) {
 			rootCmd.SetArgs([]string{})
 			initCmd.Flags().Set("prefix", "")
 			initCmd.Flags().Set("quiet", "false")
-			
+
 			tmpDir := t.TempDir()
 			originalWd, err := os.Getwd()
 			if err != nil {
@@ -80,12 +80,12 @@ func TestInitCommand(t *testing.T) {
 			if tt.quiet {
 				args = append(args, "--quiet")
 			}
-			
+
 			rootCmd.SetArgs(args)
 
 			// Run command
 			err = rootCmd.Execute()
-			
+
 			// Restore stdout and read output
 			w.Close()
 			buf.ReadFrom(r)