feat: add C implementation for @stdlib/stats/base/dists/pareto-type1/median

[rautelaKamal]

Ref: #3861.

Description

This PR adds a double-precision C implementation for @stdlib/stats/base/dists/pareto-type1/median, following the pattern established by the arcsine CDF implementation (PR #3354).

Changes

• Add C header file (include/stdlib/stats/base/dists/pareto-type1/median.h)
• Implement stdlib_base_dists_pareto_type1_median in C for double-precision
• Create Node-API addon bridge using STDLIB_MATH_BASE_NAPI_MODULE_DD_D macro
• Add GYP build configuration (binding.gyp, include.gypi, manifest.json)
• Create lib/native.js dispatcher for JavaScript integration
• Update package.json to enable gypfile
• Add comprehensive native test suite (test/test.native.js) with tryRequire pattern
• Add JavaScript native benchmark (benchmark/benchmark.native.js)
• Add C benchmark (benchmark/c/benchmark.c)
• Add C example (examples/c/example.c)
• Update README with C API documentation

Testing

• Native test suite mirrors existing test/test.js with all edge cases
• Uses standard tryRequire/skip pattern for graceful degradation

Related Issues

Does this pull request have any related issues?

This pull request has the following related issues:

• #3861
• #3355

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

No.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/dists/pareto-type1/median	$\color{green}190/190$ $\color{green}+100.00%$	$\color{green}8/8$ $\color{green}+100.00%$	$\color{green}2/2$ $\color{green}+100.00%$	$\color{green}190/190$ $\color{green}+100.00%$

The above coverage report was generated for the changes in this PR.