feat: interactive docs using Pitsby

[jessicamcinchak]

trying out Pitsby as a much lighter alternative to storybook that supports vanilla web components (Closes #26)

deployed here: https://deploy-preview-61--oslmap.netlify.app/#!/components/vanilla

get up & running locally:

• checkout branch, pnpm i to add new pitsby dependency
• pnpm run docs builds the docs in watch mode & listens for changes; site is running at https://localhost:7000
• pnpm docsPublish builds the docs so they can be served as a static site from pitsby/

deploying the docs:
I've updated Netlify "deploy settings" to publish the component library instead of the index.html sandbox (that's still around for local dev though). I additionally removed our OS API keys from Netlify, otherwise Pitsby would read them & put them in plaintext in the "template" section. These docs are a bring-your-own-API-key situation!

https://app.netlify.com/sites/oslmap/settings/deploys

before:

after:

future cleanup:

• build out more examples - custom styles using css overrides, more recent map properties, etc
• what's happening with os features examples? why is data synced?
• geojsonData example not loading?
• some way to handle env vars / OS API keys?
• typescript support?

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[DafyddLlyr]

👍

[DafyddLlyr]

This is great, and super nice to use! A big improvement and a solid step forward.

The future cleanup section of your PR was great - I hit the same issues but totally think that's a next step to look at as opposed to doing it all here.