Update .gitignore

.gitignore

@@ -73,6 +73,7 @@ StyleCopReport.xml
 *_p.c
 *_h.h
 *.ilk
+*.meta
 *.obj
 *.iobj
 *.pch
@@ -199,6 +200,10 @@ PublishScripts/
 **/[Pp]ackages/*
 # except build/, which is used as an MSBuild target.
 !**/[Pp]ackages/build/
+# except Unity related
+!**/[Pp]ackages/packages-lock.json
+!**/[Pp]ackages/manifest.json
+
 # Uncomment if necessary however generally it will be regenerated when needed
 #!**/[Pp]ackages/repositories.config
 # NuGet v3's project.json files produces more ignorable files
@@ -420,17 +425,4 @@ FodyWeavers.xsd
 # Rider auto-generates .iml files, and contentModel.xml
 **/.idea/**/*.iml
 **/.idea/**/contentModel.xml
-**/.idea/**/modules.xml
-.idea/
-
-*.suo
-*.user
-.vs/
-[Bb]in/
-[Oo]bj/
-_UpgradeReport_Files/
-[Pp]ackages/
-
-Thumbs.db
-Desktop.ini
-.DS_Store
+**/.idea/**/modules.xml