Dart runtime contexts isn't easily queried

[buenaflor]

Description

The current runtime contexts don't have a version field which makes it harder to query data.

Current state:

"dart": {
  "name": "Dart",
  "raw_description": "3.4.3 (stable) (Tue Jun 4 19:51:39 2024 +0000) on \"android_x64\"",
  "type": "runtime"
},

How it should be

"dart": {
  "name": "Dart",
  "version": "3.4.3 (stable)"
  "raw_description": "3.4.3 (stable) (Tue Jun 4 19:51:39 2024 +0000) on \"android_x64\"",
  "type": "runtime"
},