Add versioning and changelogs to QD apps

[jmulcahey-twilio]

Description

Sets the versions of all Quick Deploy apps to 1.0.0, and adds a CHANGELOG.md based around the keep a changelog format to meta-template. This is the groundwork to enable @dkundel's ideas around an update mechanism for deployed Quick Deploy apps.

Some things to consider:

• Currently, changelogs are handled manually. I couldn't find any tooling that would non-clumsily support multiple changelogs in a single Git repo. If anyone's aware of a good option here, please let me know.
• Only meta-template has a changelog so far. I plan to copy its skeleton changelog to each app in the repo, if the keep a changelog format is considered acceptable.

Checklist

• I ran npm test locally and it passed without errors.
• I acknowledge that all my contributions will be made under the project's license.

Related issues

[philnash]

This all seems fine to me. Seems like the difficult parts will be in the quick deploy update mechanism.

For consistency, should we also add versions to any templates that aren't in quick deploy too?

[jmulcahey-twilio]

This all seems fine to me. Seems like the difficult parts will be in the quick deploy update mechanism.

For consistency, should we also add versions to any templates that aren't in quick deploy too?

Agreed! The Maestro portions of this will definitely need some thought put into how we design them.

I added versioning to every app in function-templates so our non-QD stuff in this repo should be covered. If there's anything I missed though, let me know and I'll add it!