chore: 添加.gitignore文件以忽略不必要的文件和目录

添加.gitignore文件以忽略IDE配置文件、构建输出、环境变量文件等，避免将这些文件提交到版本控制中，保持仓库的整洁。

.gitignore

@@ -0,0 +1,91 @@
+/.github
+/.idea
+/.vs
+/.vscode
+/Login/.idea
+/Login/.vs
+/KeyAuth-Service/.idea
+/Admin-Keyauth/.vs
+/Admin-Keyauth/.idea
+
+#环境变量
+.env
+
+#构建删除
+/Server/Run/*.exe
+/KeyAuth-Service/Run/*.exe
+
+# 忽略所有obj
+**/obj/**
+
+# 已构建程序不上传
+*.exe
+/Server/Run/*.exe
+/KeyAuth-Service/Run/*.exe
+
+# IDEA 
+Server/.idea
+
+[Tt]humbs.db
+*.DS_Store
+
+#Visual Studio files
+*.[Oo]bj
+*.user
+*.aps
+*.pch
+*.vspscc
+*.vssscc
+*_i.c
+*_p.c
+*.ncb
+*.suo
+*.tlb
+*.tlh
+*.bak
+*.[Cc]ache
+*.ilk
+*.log
+*.lib
+*.sbr
+*.sdf
+*.opensdf
+*.unsuccessfulbuild
+ipch/
+obj/
+[Bb]in
+[Dd]ebug*/
+[Rr]elease*/
+Ankh.NoLoad
+
+#MonoDevelop
+*.pidb
+*.userprefs
+
+#Tooling
+_ReSharper*/
+*.resharper
+[Tt]est[Rr]esult*
+*.sass-cache
+
+#Project files
+[Bb]uild/
+
+#Subversion files
+.svn
+
+# Office Temp Files
+~$*
+
+#NuGet
+packages/
+
+#ncrunch
+*ncrunch*
+*crunch*.local.xml
+
+# visual studio database projects
+*.dbmdl
+
+#Test files
+*.testsettings