Make it possible to exclude options from reflection data.

[timostamm]

This implements the file option "ts.exclude_options".

Right now, the following proto:

syntax = "proto3";
package spec;

import "google/api/annotations.proto";

service AnnotatedService {
    rpc Get (AnnoGetRequest) returns (AnnoGetResponse) {
        option (google.api.http) = {
            get: "/v1/{name=messages/*}"
        };
    };
}

Will have the google.api.http option in the reflection information. Adding the following lines to the file will exclude options matching the name "google.api.*" from being emitted in the reflection information:

import "protobuf-ts.proto";
option (ts.exclude_options) = "google.api.*";

@protobuf-ts/protoc will automatically add a --proto_path to protoc calls to pickup "protobuf-ts.proto" from the plugin package.

This is the base for more TypeScript specific options in proto files.