Support Color Theming for Message Type & Field Type Declarations

[kvnxiao]

Is your feature request related to a problem? Please describe.
Currently the plugin doesn't support setting a different colour for the message type-naming, so it is difficult to read and differentiate between field type vs name of field.

e.g.

message A {
    ...
}

message B {
    A a = 1;
}

On GitHub, the message types A and B are highlighted in a blue colour, which differentiates it from the a field name declaration.

In Jetbraints products, both A and a are the same colour.

Describe the solution you'd like
Add support to colour the message type declarations and subsequently the field types as well, to differentiate colours between type vs name.

[kshchepanovskyi]

This issue is closed as plugin is not supported anymore.
Please switch to https://github.com/jvolkman/intellij-protobuf-editor.