Allow setting targetVersion to latest stable or preview

[solvedDev]

Motivation

A lot of users are confused on why they cannot use newly added Minecraft Add-On syntax within their bridge. projects.

Summary

We propose to allow the strings "latestStable" and "latestPreview" as valid target versions within the project config.
The config parser can replace these two strings with the respective versions before handing over the parsed config to other parts of the program making this a non-breaking change.

/**
 * The Minecraft version this project targets
 *
 * Use "latestStable" or "latestPreview" to always use the latest Minecraft or Minecraft Preview
 * version as your project target version
 * 
 * @example "1.17.0" / "1.16.220" / "latestStable"
 */
 targetVersion: string