Add Teleworking Components

[i-am-sijia]

This PR adds the following components to the lighthouse implementation:

• Work from home
• Telecommute frequency
• Telework arrangement (added via extensions)
• Telework duration (added via extensions)

The telework arrangement and duration components are currently under review before being merged into the next official ActivitySim release, therefore, they are currently being added to lighthouse as extensions. Once they are available in the official ActivitySim release, they can be removed from lighthouse's extensions folder.

For these four components, we are starting with the example SANDAG model specs as donor specs. As we adopt those specs, modifications needs to be made:

• Remove SANDAG specific scenario year and geographic calibration constants
• Replace disaggregate accessibility with aggregated accessibility as a placeholder
• Ensure correct updates to downstream models. E.g., workplace location choice model should only be applied to workers who do not exclusively work from home (work_from_home == True)
• Ensure jobs consumed by those who work exclusively from home are excluded from size terms, i.e.. what's included vs not included the land use employments?
• Ensure lighthouse inputs has certain required data in the donor specs, e.g., NAICS codes.
• anything that may come up...

[mnbina]

After discussing with Marty, we are assuming that the employment excludes workers who work from home exclusively / do not have a workplace location other than home.