Enables Hamilton to install under WASM

[skrawcz]

Enables Hamilton to be installed in a WASM environment.
This just special cases the environment and doesn't import process pool executor
which isn't available in a WASM env.

Changes

• import statements largely

How I tested this

• locally

Notes

• this should be SQUASH MERGED.
• when this is merged and released can update tryhamilton.dev

Checklist

• PR has an informative and human-readable title (this will be pulled into the release notes)
• Changes are limited to a single goal (no scope creep)
• Code passed the pre-commit check & code is left cleaner/nicer than when first encountered.
• Any change in functionality is tested
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged / future TODOs are captured in comments
• Project documentation has been updated if adding/changing functionality.

[ellipsis-dev]

❌ Changes requested. Reviewed everything up to 4bc1bd2 in 1 minute and 47 seconds

More details

• Looked at 20 lines of code in 1 files
• Skipped 0 files when reviewing.
• Skipped posting 3 drafted comments based on config settings.

1. hamilton/execution/executors.py:7

• Draft comment:
  Consider adding an inline comment explaining why ProcessPoolExecutor is set to None for WASM. This improves clarity for future maintainers.
• Reason this comment was not posted:
  Marked as duplicate.

2. hamilton/execution/executors.py:10

• Draft comment:
  ProcessPoolExecutor is set to None in WASM, but MultiProcessingExecutor later uses it directly. Consider adding a safeguard in MultiProcessingExecutor (or a clear error message) to handle the case where ProcessPoolExecutor is None.
• Reason this comment was not posted:
  Marked as duplicate.

3. hamilton/execution/executors.py:7

• Draft comment:
  Add a comment here explaining that on WASM environments (emscripten, wasi) the ProcessPoolExecutor is disabled due to lack of support.
• Reason this comment was not posted:
  Marked as duplicate.

Workflow ID: wflow_cNwJ4ePYMA77ad2i

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[elijahbenizzy]

Could have tests but I'm not worried for this change