[FEAT] Add command-line utilities as console-script entry points

[MikeSWang]

Is the requested feature related to an issue?

No.

Summary

Add console-script entry points so that triumvirate can be extended with command-line utilities.

As an example,

[python -m] triumvirate [--param-file=]params.yml

performs clustering statistic computations.

Alternatives

N/A

Implementation

Not provided yet.

Additional context

Utilities under consideration:

1. Re-binning of measurements;
2. Symmetric exchange of bispectrum multipole measurements;
3. Data vector concatenation and aggregation;
4. Parameter file generation.

[MikeSWang]

Reopen owing to demand.