fix: keep only source-map extracted node_modules, exclude pnpm artifacts

Restore node_modules to exact state from cli.js.map extraction:
- Move .ignored/ and .ignored_* files back to original package paths
- Remove pnpm symlinks (replaced by real source-map directories)
- Update .gitignore: only exclude /dist/, .pnpm/, .bin/, .ignored* dirs
- All package dist/ folders are now preserved as part of source-map files

After clone, run `pnpm install` to get pnpm-managed symlinks for building.
The committed node_modules contains the original TypeScript/JS source files
as bundled in cli.js.

claude-code-source/node_modules/@smithy/util-stream/dist-cjs/checksum/createChecksumStream.js

@@ -0,0 +1,12 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.createChecksumStream = createChecksumStream;
+const stream_type_check_1 = require("../stream-type-check");
+const ChecksumStream_1 = require("./ChecksumStream");
+const createChecksumStream_browser_1 = require("./createChecksumStream.browser");
+function createChecksumStream(init) {
+    if (typeof ReadableStream === "function" && (0, stream_type_check_1.isReadableStream)(init.source)) {
+        return (0, createChecksumStream_browser_1.createChecksumStream)(init);
+    }
+    return new ChecksumStream_1.ChecksumStream(init);
+}