include stdlib by default on package new (#50)_21 (Pending Deferred)

[sahithiacn]

Motivation

This is a pure DevEx change.

Move CLI is the main tool for the most developers starting with Move, and so is the standard library. While writing a Move tutorial I discovered that developers need to manually install (first they have to find - already a challenge) Standard library so they can work with Signers or Vectors or a Debug.

Another reason to add both [addresses] and [dependencies] sections to the default manifest is to showcase its features given the lack of easily-accessible documentation.

Have you read the Contributing Guidelines on pull requests?

Yes

Test Plan

This PR does not introduce new logic nor does it change anything except the Move.toml template.

[sahithiacn]

/canary

[bors-diem]

:sunny: Canary successful