Added function that searches for proposals by PI name

[Juan Marulanda (jmaruland)]

This PR adds a function that will allow BL staff to search in tiled for proposals in by PI name and cycle (optional). The goal is to allow BL staff to import this method in their bsui environment and have this function at hand during their experiments.
This function was tested with the OPLS and SMI catalogs

[Juan Marulanda (jmaruland)]

After receiving some feedback from BL staff, I added an additional input parameter that allows optional queries. This is intended for other filed in the start document that BL staff would find useful to search for proposals. I narrowed down the search to string and numerical types; other data types are not included.
E.g.:

>>> find_proposals(
        tiled_reading_client,
        "Smith",
        cycle="2026-1",
        optional_queries={"exposure_time": (">", 10)},
        show_title=True,
    )