Implement client side location polygon search

[cpjmcquillan]

Implement client side polygon search for appropriate locations

For the relevant locations, the insidePolygon filter should be applied in the algolia search client.

helper.setState(getNewState(helper.state, { insidePolygon: getPolygon() }));

For reference:

• Spike code

Acceptance criteria

• Client side location polygon search is carried out as appropriate
• Code review