Enhance plot method docstrings with additional generic plot options

When used in an IDE like VS Code, users don't get any useful information when typing `df.hvplot.scatter(...` as the `hvplot` accessor is dynamically patched on the data object on import (`import hvplot.pandas`). One valid workaround is to use instead the `hvPlot` class (`hvPlot(df).scatter(...`)), to see the signature (which only has the kind options, but that's better than nothing) and the method docstring. The method docstring only includes its specific options (e.g. `s` for `scatter`) and not all the other dozens of generic options available.

It seems like we could define a subset of common enough generic options that should always be part of the method docstrings. Or alternatively, or additionally, we could have a way to declare for each method a set of generic options that should be included in its docstring.

- [ ] Define a common subset of generic options that should be in all the plot method docstrings
- [ ] Declare for each method which additional generic options should be part of their docstring
- [ ] Implement a utility (that runs with pre-commit) that synchronizes the option docstrings from their source (the converter class) to their target (the plot methods in core.py).