build: add scaffolding to generate `math/special/*` packages

[gunjjoshi]

Resolves None.

Description

What is the purpose of this pull request?

This pull request:

• adds scaffold templates and scripts for generating packages in math/special/*.

Related Issues

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None.

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• [x] Read, understood, and followed the contributing guidelines.

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@stdlib-js/reviewers

[gunjjoshi]

Getting some CI failures which might be arising from @stdlib/ndarray/base/unary, specifically from here: https://github.com/stdlib-js/stdlib/blob/develop/lib/node_modules/%40stdlib/ndarray/base/unary/src/c_d_as_z_d.c . Maybe, it must have stdlib_complex128_t instead of stdlib_complex64_t?

[kgryte]

@gunjjoshi Yes, I'll try and take a look at ndarray/base/unary tonight.

[kgryte]

/stdlib merge

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
math/special/acosd	$\color{green}349/349$ $\color{green}+0.00%$	$\color{green}7/7$ $\color{green}+0.00%$	$\color{green}0/0$ $\color{green}+0.00%$	$\color{green}349/349$ $\color{green}+0.00%$

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