One-click build (#188)

* Add cd .. to build-njs.cmd

Minor Improvement, Working Dir should be returned to path that cmd located after build.

* One-click build

Add build.cmd to combine 3-steps build. Require VS x64 Native Shell to run cmd file.

* Update build-7z.cmd

build-7z.cmd

@@ -0,0 +1,21 @@
+@echo off
+set ZIP_BIN="C:\Program Files\7-Zip\7z.exe"
+cd /d %~dp0
+msbuild -t:restore -p:RestorePackagesConfig=true
+msbuild VRCX.sln /p:Configuration=Release /p:Platform=x64 -m
+cd html
+call npm ci
+call npm run production
+cd ..
+mklink /J "%~dp0\bin\x64\Release\html" "%~dp0\html\dist"
+setlocal
+set TODAY=%DATE:~0,4%%DATE:~5,2%%DATE:~8,2%
+set ZIP_NAME=VRCX_%TODAY%.zip
+echo %ZIP_NAME%
+rem using 7-Zip (https://www.7-zip.org)
+cd "%~dp0\bin\x64\Release"
+%ZIP_BIN% a -tzip %ZIP_NAME% * -mx=7 -xr0!cache -xr0!userdata -xr0!*.log -xr0!VRCX.json -xr0!VRCX.sqlite3
+cd "%~dp0"
+move "%~dp0\bin\x64\Release\%ZIP_NAME%" "%~dp0"
+rd "%~dp0\bin\x64\Release\html"
+pause