WIP adding row data

plugins/ui/docs/hooks/use_row_data.md

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+# use_row_data
+
+`use_row_data` lets you use the data of the first row of a table. This is useful when you want to listen to an updating table and use the data in your component.
+
+## Example
+
+```python
+from deephaven import time_table, ui
+
+
+@ui.component
+def ui_table_row(table):
+    row_data = ui.use_row_data(table)
+    return ui.heading(f"The row data is {row_data}")
+
+
+table_row = ui_table_row(time_table("PT1s").update("x=i").tail(5).reverse())
+```
+
+## Recommendations
+
+1. **Use `use_row_data` for listening to table updates**: If you need to listen to a table for one row of data, use `use_row_data`.
+2. **Use table operations to filter to one row**: If your table has multiple rows and columns, use table operations such as `.where`, `.select` and `.reverse` to filter to the row you want to listen to. `use_row_data` always uses the first row of the table.
+
+## API