feat(01-02): dispatch typed events with request context

- App-owned festival bus with Fire, Collect and UntilHandled
- Recover listener panics with owner plugin IDs; isolate buses per app
- towel context accessors and hello command demo of all three modes

towel/context_test.go

@@ -2,8 +2,6 @@ package towel
 
 import (
 	"context"
-	"go/parser"
-	"go/token"
 	"os"
 	"strings"
 	"testing"
@@ -40,21 +38,11 @@ func TestNoPackageGlobalRequestState(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	fset := token.NewFileSet()
 	for _, entry := range entries {
 		name := entry.Name()
 		if entry.IsDir() || !strings.HasSuffix(name, ".go") || strings.HasSuffix(name, "_test.go") {
 			continue
 		}
-		file, err := parser.ParseFile(fset, name, nil, parser.SkipObjectResolution)
-		if err != nil {
-			t.Fatal(err)
-		}
-		for _, spec := range file.Decls {
-			gen, ok := spec.(interface{ TokString() string })
-			_ = gen
-			_ = ok
-		}
 		src, err := os.ReadFile(name)
 		if err != nil {
 			t.Fatal(err)