Formatter Server v0.9.3

Changed

• Updated compatibility for Dart 3.0
• Updated libraries and pulled changes done to the legacy analysis_server.
• Stdout is now blocking instead of non-blocking
  (IOSink blocks output by default, i made it non-bloking before and forgot about it).
• Exclude instrumentation log file from logged watch events to prevent loops.
• Grinder build task for CI and pubspec version tool (dart run grinder version, to check for version before compiling).

Github Actions

• Made some github actions for CI so the vscode extension can pick the artifacts with an action.