TwitchChatVotingProxy: Add README

TwitchChatVotingProxy/README.md

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+# ChaosMod TwitchChatVotingProxy Project
+
+This is where the source code for the voting process resides in. Contrary to the name it supports multiple platforms now: Twitch and Discord.
+
+## Building
+
+Either through Visual Studio or using the `dotnet` CLI tool (`dotnet build` or `dotnet publish`).
+
+## Coding conventions
+
+- This project provides a custom .editorconfig file. Please make sure to format your source code before contributing, there should be support for just about every IDE / editor out there - either officially or using an extension. Alternatively you can run `dotnet format`.
+- Always use brackets for if, for and while expressions.
+- Naming:
+    - Private member variables: `m_Foo`
+    - Static global variables specific to file: `ms_Foo`
+    - Global member: `Foo`