Adjust project filter function so filtered view has a dedicated URL

[theecrit]

What are you submitting?

Place an x in the appropriate bracket:

• Bug (something's broken)
• Feature request or improvement
• Content update
• Question
• Other

Description

I want a way to grab the URL of a filtered view for the /projects page (e.g. openoakland.org/projects/inactive), so I can share it.

Context/additional info

• Code for project filter lives in /src/assets/js/project_filter.js

Thank you!

• Please document your design and tech decisions in your pull request so others can follow along and understand why we've made the decisions we have.
• If you'd like feedback, input, or help, share your thoughts or question in this issue's comments.