[Place Page Revamp] Add a new development endpoint

[juliawu]

Adds a new endpoint to hold the revamped place pages while in development.

In particular, changes include:

• Renaming _nl_search_bar.scss to without the leading underscore to allow @use importing
• A starter .js file that renders the nl search bar at the top of the page
• A starter .html template that renders the place name, type, and links to parent places
• A starter .scss file for styling
• A new /dev-place blueprint and endpoint in flask to hold changes
• Update the link generation helper functions to also use the new endpoint

An example:

/dev-place/geoId/667000

[juliawu]

lgtm in general.

i'd lean towards making a new directory, rather than using things within /place. that will make it easier to switch over once dev is completed. it'll also help to avoid any unintended dependencies

Good idea, switched to using a new directory "/dev_place"