reconstruct and build @anthropic-ai/claude-code source from source map

- Extract 4756 source files from cli.js.map (57MB)
- Set up Bun build system with bun:bundle feature flag shim
- Configure 90+ compile-time feature flags matching production defaults
- Inject MACRO constants (VERSION, BUILD_TIME, etc.)
- Create stubs for private packages (color-diff-napi, modifiers-napi, etc.)
- Install all public dependencies via pnpm
- Patch commander v14 to allow multi-char short flags (-d2e)
- Build output: dist/cli.js (22MB), verified working

claude-code-source/node_modules/.ignored/react-reconciler/cjs/react-reconciler-constants.production.js

@@ -0,0 +1,18 @@
+/**
+ * @license React
+ * react-reconciler-constants.production.js
+ *
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+"use strict";
+exports.ConcurrentRoot = 1;
+exports.ContinuousEventPriority = 8;
+exports.DefaultEventPriority = 32;
+exports.DiscreteEventPriority = 2;
+exports.IdleEventPriority = 268435456;
+exports.LegacyRoot = 0;
+exports.NoEventPriority = 0;