feat: Adding maps

[jnumainville]

Closes #29, closes #28, closes #27, closes #26, and closes #21

Adds basic capabilities for all maps with the exception of choropleth
I originally was trying to include choropleths as well but they're a bit more complicated and I already have spent a bit too long on this for the moment. The other maps are basically free to implement.

There is a graphical issue with density mapbox that would be good for @mattrunyon to look at when adding the defaults. The data is there but not being drawn.
Here's some code to recreate the issue:

import deephaven.plot.express as dx
from deephaven import time_table
import random 
import pandas as pd
import deephaven.pandas as dhpd

df = pd.read_csv('https://raw.githubusercontent.com/plotly/datasets/master/earthquakes-23k.csv')

t = dhpd.to_table(df)

fig = dx.density_mapbox(t,  lat='Latitude', lon='Longitude', z='Magnitude', radius=10,
                        center=dict(lat=0, lon=180), zoom=0,
                        mapbox_style="stamen-terrain")

I see a ton of errors in the console, some along the line of "The layer 'plotly-trace-layer-ea2295-heatmap' does not exist in the map's style and cannot be styled."

Additionally, geo plots have the snapping issue when dragging when new data loads in that 3d plots had. Using the same imports:

sourceh = time_table("PT1S").update(formulas=[
    "X = (float) random.uniform(-90, 90)", 
    "Y = (float) random.uniform(-180, 180)", 
    "Z = (float)random.gauss(3, 3)",
    "l1 = i % 20",
    "l2 = i % 30",
    ])

def update(fig):
    fig.update_geos(showland=True, landcolor="gray")

figs = dx.scatter_geo(
    sourceh, 
    lat="X", 
    lon="Y", 
    by="l1", 
    size="Z",
    color_discrete_sequence=["salmon", "lemonchiffon"],
    projection="natural earth",
    unsafe_update_figure=update
)

[jnumainville]

Some examples:

import deephaven.plot.express as dx
from deephaven import time_table
import random 

sourceh = time_table("PT1S").update(formulas=[
    "X = (float) random.uniform(-90, 90)", 
    "Y = (float) random.uniform(-180, 180)", 
    "Z = (float)random.gauss(3, 3)",
    "l1 = i % 20",
    "l2 = i % 30",
    ])

def update(fig):
    fig.update_geos(showland=True, landcolor="gray")

figs = dx.scatter_geo(
    sourceh, 
    lat="X", 
    lon="Y", 
    by="l1", 
    size="Z",
    color_discrete_sequence=["salmon", "lemonchiffon"],
    projection="natural earth",
    unsafe_update_figure=update
)

figs = dx.line_geo(
    sourceh, 
    lat="X", 
    lon="Y", 
    by="l1", 
    by_vars=("color", "width"),
    color_discrete_sequence=["salmon", "lemonchiffon"],
    projection="natural earth",
    unsafe_update_figure=update
)

figs = dx.line_mapbox(
    sourceh, 
    lat="X", 
    lon="Y", 
    color="l1",
    color_discrete_sequence=["salmon", "lemonchiffon"],
    center=dict(lat=0, lon=180), zoom=0,
)

figs = dx.scatter_mapbox(
    sourceh, 
    lat="X", 
    lon="Y", 
    color="l1",
    color_discrete_sequence=["salmon", "lemonchiffon"],
    center=dict(lat=0, lon=180), zoom=0,
)

[mofojed]

Just need default colours applied to these maps before merging.

[mofojed]

Open a ticket for default colours of maps. Should tie in with the current theme.

[mofojed]

Ticket opened for default colours: deephaven/web-client-ui#1722