Strip IDE cruft, stale build binaries, and dead source copies before external push

Removes Visual Studio local-state files (.vs/, .vcxproj.user, .suo/.VC.db),
precompiled Windows server binaries (now built from source via Docker), and
"Copy of"/.bak duplicate source/data files that were never referenced by the
CMake build. Adds matching .gitignore rules so they don't come back.

CharServer/CharServer.vcxproj.user

@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <LocalDebuggerWorkingDirectory>..\Binary</LocalDebuggerWorkingDirectory>
-    <DebuggerFlavor>WindowsLocalDebugger</DebuggerFlavor>
-  </PropertyGroup>
-</Project>