Add .gitignore to the Unity project.

Author: timbotimbo

example/unity/DemoApp/.gitignore

@@ -0,0 +1,99 @@
+# This .gitignore file should be placed at the root of your Unity project directory
+#
+# Get latest from https://github.com/github/gitignore/blob/main/Unity.gitignore
+#
+.utmp/
+/[Ll]ibrary/
+/[Tt]emp/
+/[Oo]bj/
+/[Bb]uild/
+/[Bb]uilds/
+/[Ll]ogs/
+/[Uu]ser[Ss]ettings/
+*.log
+
+# By default unity supports Blender asset imports, *.blend1 blender files do not need to be commited to version control.
+*.blend1
+*.blend1.meta
+
+# MemoryCaptures can get excessive in size.
+# They also could contain extremely sensitive data
+/[Mm]emoryCaptures/
+
+# Recordings can get excessive in size
+/[Rr]ecordings/
+
+# Uncomment this line if you wish to ignore the asset store tools plugin
+# /[Aa]ssets/AssetStoreTools*
+
+# Autogenerated Jetbrains Rider plugin
+/[Aa]ssets/Plugins/Editor/JetBrains*
+# Jetbrains Rider personal-layer settings
+*.DotSettings.user
+
+# Visual Studio cache directory
+.vs/
+
+# Gradle cache directory
+.gradle/
+
+# Autogenerated VS/MD/Consulo solution and project files
+ExportedObj/
+.consulo/
+*.csproj
+*.unityproj
+*.sln
+*.suo
+*.tmp
+*.user
+*.userprefs
+*.pidb
+*.booproj
+*.svd
+*.pdb
+*.mdb
+*.opendb
+*.VC.db
+
+# Unity3D generated meta files
+*.pidb.meta
+*.pdb.meta
+*.mdb.meta
+
+# Unity3D generated file on crash reports
+sysinfo.txt
+
+# Mono auto generated files
+mono_crash.*
+
+# Builds
+*.apk
+*.aab
+*.unitypackage
+*.unitypackage.meta
+*.app
+
+# Crashlytics generated file
+crashlytics-build.properties
+
+# TestRunner generated files
+InitTestScene*.unity*
+
+# Addressables default ignores, before user customizations
+/ServerData
+/[Aa]ssets/StreamingAssets/aa*
+/[Aa]ssets/AddressableAssetsData/link.xml*
+/[Aa]ssets/Addressables_Temp*
+# By default, Addressables content builds will generate addressables_content_state.bin
+# files in platform-specific subfolders, for example:
+# /Assets/AddressableAssetsData/OSX/addressables_content_state.bin
+/[Aa]ssets/AddressableAssetsData/*/*.bin*
+
+# Visual Scripting auto-generated files
+/[Aa]ssets/Unity.VisualScripting.Generated/VisualScripting.Flow/UnitOptions.db
+/[Aa]ssets/Unity.VisualScripting.Generated/VisualScripting.Flow/UnitOptions.db.meta
+/[Aa]ssets/Unity.VisualScripting.Generated/VisualScripting.Core/Property Providers
+/[Aa]ssets/Unity.VisualScripting.Generated/VisualScripting.Core/Property Providers.meta
+
+# Auto-generated scenes by play mode tests
+/[Aa]ssets/[Ii]nit[Tt]est[Ss]cene*.unity*