[#100] Wayfinding Spaces and Places Floor plan end points

[clint156]

Description

Please provide a summary of the pull request and the issue it resolves. Please add necessary details, context, dependencies, explanation of when review is needed (see next section), etc.
Implement the floorplans and building search end points for the spaces and places endpoints as part of the wayfinding data exposed by the apis.

**Resolves #100 **

Review Time Estimate

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Type of changes

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• Bug fix (non-breaking change which fixes an issue).
• [x ] New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to not work as expected).
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Checklist:

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• [ x] I have signed the Rokwire Contributor License Agreement (CLA). (Any contributor who is not an employee of the University of Illinois whose official duties include contributing to the Rokwire software, or who is not paid by the Rokwire project, needs to sign the CLA before their contribution can be accepted.)
• [x ] I have updated the CHANGELOG.
• [x ] I have read the Contributor Guidelines.
• [x ] I have performed a self-review of my own code.
• [ x] I have commented my code, particularly in hard-to-understand areas.
• [x ] My change requires updating the documentation.
• I have made necessary changes to the documentation.
• I have added tests related to my changes.
• [ x] My changes generate no new warnings.
• [x ] New and existing unit tests pass locally with my changes.
• Any dependent changes have been merged and published in downstream modules.

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[clint156]

Swagger documentation still needs to be completed but I need to get the changes to Dev for Aidan quickly and it's taking me a while to work through the documentation I need to. I will open a new issue for documentation to address that.

[clint156]

for sake of time, skipping review.