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/compact.go

@@ -123,10 +123,10 @@ func runCompactSingle(ctx context.Context, compactor *compact.Compactor, store *
 	if compactDryRun {
 		if jsonOutput {
 			output := map[string]interface{}{
-				"dry_run":       true,
-				"tier":          compactTier,
-				"issue_id":      issueID,
-				"original_size": originalSize,
+				"dry_run":             true,
+				"tier":                compactTier,
+				"issue_id":            issueID,
+				"original_size":       originalSize,
 				"estimated_reduction": "70-80%",
 			}
 			outputJSON(output)