feat: add C implementation for stats/base/dists/uniform/mean

[0PrashantYadav0]

Resolves #3830

Description

What is the purpose of this pull request?

This pull request:

• adds C implementation for @stdlib/stats/base/dists/uniform/mean along with relevant tests, benchmarks and examples

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves [RFC]: Add C implementation for @stdlib/stats/base/dists/uniform/mean #3830

Questions

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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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Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/dists/uniform/mean	$\color{green}175/175$ $\color{green}+100.00\%$	$\color{green}7/7$ $\color{green}+100.00\%$	$\color{green}2/2$ $\color{green}+100.00\%$	$\color{green}175/175$ $\color{green}+100.00\%$

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