feat: add C implementation for stats/base/dists/t/logpdf

[AadishJ]

Resolves #3873.

Description

What is the purpose of this pull request?

This pull request:

• Adds a C implementation of the t logpdf.
• Includes benchmarks for the C implementation.
• Provides examples demonstrating the usage of the t logpdf in C.

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves [RFC]: Add C implementation for @stdlib/stats/base/dists/t/logpdf #3873

Questions

Any questions for reviewers of this pull request?

No.

Other

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No.

Checklist

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

• Read, understood, and followed the contributing guidelines.

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@stdlib-js/reviewers

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/dists/t/logpdf	$\color{green}273/273$ $\color{green}+100.00\%$	$\color{green}17/17$ $\color{green}+100.00\%$	$\color{green}4/4$ $\color{green}+100.00\%$	$\color{green}273/273$ $\color{green}+100.00\%$

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

[Planeshifter]

Thank you, @AadishJ! Fixed a few things but this should be ready to land otherwise.

[stdlib-bot]

PR Commit Message

feat: add C implementation for `stats/base/dists/t/logpdf`

PR-URL: https://github.com/stdlib-js/stdlib/pull/3934
Closes: https://github.com/stdlib-js/stdlib/issues/3873

Co-authored-by: Aadish Jain <firestorm@AadishJain>
Co-authored-by: Philipp Burckhardt <pburckhardt@outlook.com>
Reviewed-by: Philipp Burckhardt <pburckhardt@outlook.com>
Signed-off-by: Philipp Burckhardt <pburckhardt@outlook.com>

Please review the above commit message and make any necessary adjustments.