feat: add C ndarray interface and refactor implementation for stats/base/dmeanlipw

PR-URL: stdlib-js#4733

Reviewed-by: Philipp Burckhardt <[email protected]>
Reviewed-by: Aayush Khanna <[email protected]>

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
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    status: passed
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    status: passed
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    status: na
  - task: lint_javascript_tests
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  - task: lint_python
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  - task: lint_r
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  - task: lint_c_src
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  - task: lint_c_examples
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  - task: lint_shell
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  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: 0PrashantYadav0