feat: Column sources for ui.table formatting

[mattrunyon]

Fixes #984

Allows all string format values to instead specify a column as the source. Ensures the column is always fetched and throws if the column is not a string type (can cause some really bad performance issues if value formatting is invalid). Also modified to just resolve all theme colors since this change could lead to unresolved theme colors in a column source.

The example in the docs or this example shows the feature working. Change the String cast on line 6 to non-string to test the error is thrown and displayed.

This example uses an input table joined to the table so you can adjust the formatting colors via input table (something Raffi asked about specifically)

from deephaven import input_table
from deephaven import ui
import deephaven.plot.express as dx

_stocks = dx.data.stocks()
_source = _stocks.select_distinct("Sym").update("Color=(String)null")

color_source = input_table(init_table=_source, key_cols="Sym")

t = ui.table(
    _stocks.natural_join(color_source, "Sym", "SymColor=Color"),
    hidden_columns=["SymColor"],
    format_=[
        ui.TableFormat(cols="Sym", background_color="SymColor")
    ],
)

[bmingles]

Curious what this improves over the previous version?

[mattrunyon]

The previous version was actually a React error if the length of the array changed. useMemo dependency array is supposed to be a constant length, so this should allow for variable length arrays.

I will probably be replacing this with a useDeepEquals in a future PR that also handles objects

[bmingles]

Ah makes sense. Forgot about the length nuance. With that in mind, you could optimize this a bit more by checking if the length has changed before traversing the array.

[bmingles]

Suggested change

	if (!array.every((v, i) => v === stableArray.current[i])) {
	if (array.length !== stableArray.length || !array.every((v, i) => v === stableArray.current[i])) {

[bmingles]

1 suggestion on error message. Otherwise, code looks good. Verified the String + non-string cases.

[bmingles]

1 more suggestion to optimize the array memoization

[bmingles]

LGTM