Add database merging feature (#906)

* add initial implementation of dbmerger

merges of user tables that have overlapping data is still unimplemented. otherwise, merging of all other tables has been implemented.

* add handling for when user feed tables overlap

* fix sqlite dll path in dbmerger build

* fix accidentally inserting rows with nonunique pks

* fix merger not handling missing columns well

* fix sort not reassigning pks

* sync merger with master

* woopsies

* w-woops again

* reset database version in config to let vrcx generate missing fields

* move to net 9 and move build folder to new build folder

* remove unneeded build configurations

* support avatar time in the merge

* csproj pains

---------

Co-authored-by: Natsumi <cmcooper123@hotmail.com>

Dotnet/VRCX-Cef.csproj

@@ -5,7 +5,7 @@
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
     <TargetFramework>net9-windows10.0.19041.0</TargetFramework>
-    <Platforms>x64</Platforms>
+    <Platform>x64</Platform>
     <UseWindowsForms>true</UseWindowsForms>
     <ApplicationRevision>0</ApplicationRevision>
     <ApplicationVersion>1.0.0.%2a</ApplicationVersion>
@@ -46,7 +46,7 @@
     <StartupObject />
     <CefSharpExcludeSubProcessExe>true</CefSharpExcludeSubProcessExe>
   </PropertyGroup>
-  <PropertyGroup Condition="'$(PlatformTarget)' == 'x64'">
+  <PropertyGroup>
     <RuntimeIdentifier Condition="'$(RuntimeIdentifier)' == ''">win-x64</RuntimeIdentifier>
     <SelfContained Condition="'$(SelfContained)' == ''">false</SelfContained>
   </PropertyGroup>
@@ -59,6 +59,11 @@
     <CleanSQLiteInteropFiles>false</CleanSQLiteInteropFiles>
     <CollectSQLiteInteropFiles>false</CollectSQLiteInteropFiles>
   </PropertyGroup>
+  <ItemGroup>
+    <Compile Remove="DBMerger\**" />
+    <EmbeddedResource Remove="DBMerger\**" />
+    <None Remove="DBMerger\**" />
+  </ItemGroup>
   <ItemGroup>
 	  <Reference Include="Blake2Sharp">
 		  <HintPath>libs\Blake2Sharp.dll</HintPath>