docs for passing data to 3DStreet via hash

[kfarr]

As a user of either 3DStreet viewer or 3dstreet-editor (3dstreet.app) I can pass a URL or extra data as a "hash" symbol from multiple third-party sources.

As a developer of 3DStreet I'd like to be able to clearly understand a user's intent when they load from a third-party service through a standard way of supporting multiple embedded data types and third-party service URLs.

Here is an attempt to document this behavior.

Streetmix Path

https://github.3dstreet.org/#https://streetmix.net/kfarr/3/3dstreet-demo-street
https://3dstreet.app/#https://streetmix.net/kfarr/3/3dstreet-demo-street

3DStreet Scene JSON Path

https://github.3dstreet.org/#https://3dstreet.app/scenes/5f44ac44-d33c-4942-bc8d-3827018bab2f.json
https://3dstreet.app/#/scenes/5f44ac44-d33c-4942-bc8d-3827018bab2f.json

Future services under development:

Bollard Buddy Mapper - Crushed JSON Entities

https://bollard-buddy-ar.glitch.me - sample app
https://bollard-buddy-mapper.glitch.me/?data=%5BIBP*BK1753808557987213M8743762969970703LQ998706N2766571*B.8186489939689636M333N691314697266O63N681301116943*BK30109990388154984S11122584342956543O122168779373169*G1.4485996961593628S25578737258911133O1909589767456055*GQ3R14151334762573S3907907R9124756T931634664535522*GQ64729R50983429S40N5738220214844TR9386301N065*C.5397945N6424866E.782535195350647LQ7445403933525085*CPD%5D*D%2CIA%27~posiJBHtraffic-coneA0CHjersey-barrier-plasticA0D)~rotaJ0P))E~y!0F~z!GsafehitAHtemporary-I(%27mixin!%27Jtion!(%27x!K.0LF-M~y!-0K0N04OL2.PEF0Q0.R00SEKTL1.9%01TSRQPONMLKJIHGFEDCBA*_

Url encoded streetmix JSON (from #500 )

to load from url encoded streetmix json you need:

1. Url encoded streetmix JSON. JSON can be obtained from the Editor, StreetmixAPIURL parameter in the streetmix-loader component of the #default-street element. String can be encoded through encodeURIComponent func in console or here for example: https://www.urlencoder.org/
2. Paste encoded string after http://localhost:7001/#streetmix-json: or http://localhost:7001/#3dstreet-json: for 3dstreet data

streetplan via json url (from #498 )

https://github.3dstreet.org/#https://upd.streetplan.net/streets-3d-data/79287
https://3dstreet.app/#https://upd.streetplan.net/streets-3d-data/79287

data url: https://upd.streetplan.net/streets-3d-data/79287
user facing url: https://upd.streetplan.net/MyState/MyOrg/MyProj/79287

streetmix via json url (not supported - should we add this? bike game use case)

https://github.3dstreet.org/#https://streetmix.net/api/v1/streets?namespacedId=3&creatorId=kfarr
https://3dstreet.app/#https://streetmix.net/api/v1/streets?namespacedId=3&creatorId=kfarr