Upgrade JupyterBook to v2

[raebot]

This PR upgrades JupyterBook to v2 and also removes and gitignores compiled portfolio sites. Many of the file changes in this PR are a result of removing the portfolio site files, so there is quite a bit of noise.

You can see the result of this upgrade on staging for these portfolio sites:

• AHSC Ridership Prediction Dashboard - ahsc
• HQ Transit Corridor & Major Bus Stop Explorer - hqta - This one is partially deployed. There was an error with the branching pathway notebook, so I deployed everything except that page. An analyst will need to address this issue to deploy that page.
• SB125 Fund Split Analysis - sba125_fund_split_analysis

When attempting to deploy other sites, I ran into the following errors that analysts will need to address in the notebooks before we can deploy.

• district_digest - error where NB cell has no output
• gtfs_digest - ValueError: Unable to determine data type for the field "Percent of Trips with Vehicle Positions"
• new_transit_metrics - needs to be migrated off of siuba
• ntd_annual_ridership_report - needs to be migrated to us GCSPandas helpers - got the ArrowInvalid error
• ntd_monthly_ridership - error importing label_visualization from shared_utils.portfolio_utils
• rt_trip_updates_operator_metrics - needs to be migrated to us GCSPandas helpers - got the ArrowInvalid error
• rt_trip_updates_stop_metrics - needs to be migrated to us GCSPandas helpers - got the ArrowInvalid error
• rt - error in %%capture_parameters cell in ca_transit_speed_maps/01_new_speedmaps.ipynb
• thruway_intercity_bus - issue with vegafusion[embed] install

Relates to #1854

[raebot]

• Figure out vega editor functionality

• Get fuller width for visualizations

• Style dropdowns

• Possible to show active page links?

• Change build stderr default to true

• MD H3 header not rendering correctly on HQTA branching page

• Hide contents right side menu?

• Link not rendering on HQTA stop frequency

• CalITP logo at bottom of page - poll the team Keep the logos in, figure out way to get them rendering better

[edasmalchi]

currently using fixed widths for webapp maps -- can we make that dynamic somehow?

data-analyses/_shared_utils/shared_utils/webmap_utils.py

Lines 149 to 157 in d473f0c

	def display_spa_map(spa_map_url: str, width: int = 1000, height: int = 650) -> None:
	"""
	Display map from external simple web app in the notebook/JupyterBook context via an IFrame.
	Width/height defaults are current best option for JupyterBook, don't change for portfolio use
	width, height: int (pixels)
	"""
	i = IFrame(spa_map_url, width=width, height=height)
	display(i)
	return

[raebot]

Hey @edasmalchi , we noticed that JupyterBook v2 changes the way URLs for the sites and subpages are generated. For instance, with v1 we have https://analysis.dds.dot.ca.gov/hqta_explorer/00__19_spatial_pathway__.html and or v2 we have https://analysis-staging.dds.dot.ca.gov/hqta_explorer/spatial-pathway/index.html. Is this ok? Do you all reference these v1 URLs elsewhere or know of people relying on these subpage URLs?