Generate protobufs ourselves using protobuf-net.Reflection

[yaakov-h]

Another approach to #628.

This assumes/ignores the [DefaultValue] problem. I think if we can get that upstreamed, this will be fine.

Note that:

• I'm just outright ignoring the "hey you didn't specify proto2 or proto3" warning.
• This removes XmlSerializer attributes
• This removes [Serializable]
• This removes EnumPassthru, though I don't know if that is still needed or not.

[yaakov-h]

The DefaultValue bug has been fixed (protobuf-net/protobuf-net#516) but I have no idea if/when that code will be released.

I guess compiling protobuf-net ourselves (without any custom patches) wouldn't be so bad...

[yaakov-h]

With these change, _ characaters are being dropped in enum names, e.g. k_Foo becomes just kFoo.

[codecov-io]

Codecov Report

Merging #686 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #686   +/-   ##
=======================================
  Coverage   22.44%   22.44%           
=======================================
  Files          96       96           
  Lines        9674     9674           
  Branches      817      817           
=======================================
  Hits         2171     2171           
  Misses       7370     7370           
  Partials      133      133

Impacted Files	Coverage Δ
...team/Handlers/SteamMatchmaking/SteamMatchmaking.cs	3.77% <ø> (ø)	⬆️

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[yaakov-h]

_ characters are no longer being dropped after updating to latest (alpha) protobuf-net.Reflection.

The flip side is that enum values have exactly the same name as in the protobuf, so many are now SCREAMING_SNAKE_CASE as per the original protos.

This PR now relies on protobuf-net/protobuf-net#518.

[xPaw]

This file changed for no reason (line endings I assume?)

This also affected the csv file and the powershell script.

[yaakov-h]

I only moved the files... possibly something in my git install tweaked the line endings?

[xPaw]

This looks like it achieves the same result as my patch approach, except by extending protobuf.net, so that's good.

The only missing change would be forced default to proto2 version, instead of leaving it null, I am unsure if this actually affects any of the generated output.

[xPaw]

Tested this by running SteamDB, it builds and runs as expected.

[yaakov-h]

Tested and verified that EnumPassthru is no longer required.