scripts/ update - move to Typescript, import wallets, contracts, and network config.

[justinschuldt]

Couple things here to make the script development faster/easier:

• migrated all the js to Typescript
• the Typescript (library.ts) now reads wallets from keys.tetrrain.js
• added a new file, networks.ts that supplies the network config, and the contract addresses.
• added a VSCode debugger config for scripts/, so you can run any script in NodeJS's debug mode, and set breakpoints, see variable values, etc.

Housekeeping:
I updated the root javascript/package.json so now @terra-money/terrain is checked into the package-lock.json, and the terrain deploy/migrate commands use the module from node_modules rather than using npx to get the module. I made this change to prevent future breakage, as npx will fetch the latest version at runtime, it's only a matter of time until their module has a breaking change, then this repo would stop working as described in the README. Want this to still work in 6 months, a year from now, etc. without us having to maintain it.

[justinschuldt]

fyi @am-work