message: docs: add a windows known issue
  Add a known issue of windows angular build.
  PR Close
diff: @@ -256,6 +256,7 @@ Usually there is a single item (or multiple items of the same kind) where the ov
  ### Windows
  +#### bazel run
  If you see the following error:
  ```
  @@ -277,6 +278,25 @@ Require stack:
  e.g: `yarn bazel test packages/core/test/bundling/forms:symbol_test --config=ivy`
  +#### mkdir missing
  +If you see the following error::
  +```
  +
  +ERROR: An error occurred during the fetch of repository 'npm':
  + Traceback (most recent call last):
  + File "C:/users/anusername/_bazel_anusername/idexbm2i/external/build_bazel_rules_nodejs/internal/npm_install/npm_install.bzl", line 618, column 15, in _yarn_install_impl
  + _copy_file(repository_ctx, repository_ctx.attr.package_json)
  + File "C:/users/anusername/_bazel_anusername/idexbm2i/external/build_bazel_rules_nodejs/internal/npm_install/npm_install.bzl", line 345, column 17, in _copy_file
  + fail("mkdir -p %s failed: \nSTDOUT:\n%s\nSTDERR:\n%s" % (dirname, result.stdout, result.stderr))
  +Error in fail: mkdir -p _ failed:
  +
  +```
  +The `msys64` library and associated tools (like `mkdir`) are required to build Angular.
  +
  +Make sure you have `C:\msys64\usr\bin` in the "system" `PATH` rather than the "user" `PATH`.
  +
  +After that, a `git clean -xfd`, `yarn`, and `node scripts\build\build-packages-dist.js` should resolve this issue.
  +
  ### Xcode
  If you see the following error:
  