feat: add `blas/base/dtpsv`

[aman-095]

Progresses #2039.

Description

What is the purpose of this pull request?

This RFC proposes to add a routine to solve one of the systems of equations A*x = b or A^T*x = b where b and x are N element vectors and A is an N by N unit, or non-unit, upper or lower triangular matrix, supplied in packed form as defined in BLAS Level 2 routines. Specifically adding @stdlib/blas/base/dtpsv is proposed.

Related Issues

Does this pull request have any related issues?

This pull request:

• progresses #2039

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.

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

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