Use `*_contracts.json` files to populate the sdk

[prestwich]

@kekonen requested that we add xappconnectionmanagers to the SDK contracts objects.

The way I’d prefer to do it is taking the deploy’s *_contracts.json files as an input to SDK context instantiation, that we go ahead and get all nomad contracts without having to manually copy+paste contract addresses

so the set of changes I’d prefer is something like:

• create a root level deploys/ folder
• move the *_contracts.json files to deploys/
• have the deploy process output future *_contracts.json to deploys/whatever
• have the build process for the sdk copy files from deploys/ to typescript/sdk/nomad/domains/deploys/
• have the sdk load all the json
• ensure the sdk packaging copys those json to dist and includes them in the published package

cc @anna-carroll for sanity checking and deploy-code changes

in the meantime, @kekonen should go ahead and add the connection manager manually

[anna-carroll]

sounds great to me 🌷

[yourbuddyconner]

This relates to #69, both issues discuss alternative approaches to smoothing out configuration in the monorepo.