Create JSON Schema to utilize with code editors

[JordanSussman]

Description

Create a JSON schema to allow code editors to parse the .vela.yml and help users understand if the format is valid or not.

The simple steps to test the JSON schema:

1. convert complex .vela.yml from yaml to json
2. utilize https://jsonschema.net/home to create JSON schema
3. follow editor specific instructions to utilize the schema for .vela.yml
   • VScode docs https://code.visualstudio.com/docs/languages/json#_json-schemas-and-settings

Definition of Done

Users able to configure code editor to utilize published JSON schema for file validation

Effort (Optional)

2 days

Impacted Personas (Optional)

All users modifying .vela.yml within any code editor

[jbrockopp]

Hello 👋

The Vela admins have decided to condense all existing issues into a single repo found @ go-vela/community.

For a direct link to your counterpart issue in that repo, you can find it linked yesterday in the history of this issue.

If you have any questions, please feel free to direct them to the community repo.

Thanks for your input and feedback!