feat(rust,python,cli): add SQL engine support for REPLACE string function

[alexander-beedie]

Adds SQL support for "REPLACE" (equivalent to polars replace_all when "literal=True").

Example

import polars as pl

df = pl.DataFrame({"txt": ["Yemeni coffee is the best coffee"]})

with pl.SQLContext(df=df) as ctx:
    out = ctx.execute(
        """
        SELECT *,
          REPLACE(
            REPLACE(txt, 'coffee', 'tea'),
            'Yemeni',
            'English breakfast'
          ) AS "updated"
        FROM df
        """
    ).collect()

with pl.Config( fmt_str_lengths=50 ):
    print(out)
    
    # shape: (1, 2)
    # ┌──────────────────────────────────┬───────────────────────────────────────┐
    # │ txt                              ┆ updated                               │
    # │ ---                              ┆ ---                                   │
    # │ str                              ┆ str                                   │
    # ╞══════════════════════════════════╪═══════════════════════════════════════╡
    # │ Yemeni coffee is the best coffee ┆ English breakfast tea is the best tea │
    # └──────────────────────────────────┴───────────────────────────────────────┘

[ritchie46]

How do you find them all?

[alexander-beedie]

How do you find them all?

This helps: #7227. I go back to that semi-regularly to grab things off the pile (or add to it); there is no shortage of things to add, so I usually take on the more obviously useful or easy to implement functions first ;)