Optimized the initialization of this project

In this submission, we optimized three points:
1. The package path and `groupId` were changed to `edu.cmipt`.
2. Delete the redundant directory `gcs-back-end`.
3. Use `.gitignore` to set files that git should ignore and not track.

.gitignore

@@ -22,3 +22,25 @@
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
 replay_pid*
+
+# Eclipse specific files
+/.settings/
+/.project
+/.classpath
+/.factorypath
+
+# IntelliJ IDEA specific files
+/.idea/
+/*.iml
+/out/
+
+# VSCode specific files
+/.vscode/
+
+# Maven specific files
+/target/
+
+# Other common patterns
+*.swp
+.DS_Store
+Thumbs.db

gcs-back-end/pom.xml → pom.xml

@@ -4,7 +4,7 @@
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
 
-  <groupId>com.cmipt</groupId>
+  <groupId>edu.cmipt</groupId>
   <artifactId>gcs-back-end</artifactId>
   <version>1.0-SNAPSHOT</version>
 
@@ -17,6 +17,7 @@
     <maven.compiler.source>17</maven.compiler.source>
     <maven.compiler.target>17</maven.compiler.target>
     <java.version>17</java.version>
+    <spring.boot.version>2.5.4</spring.boot.version>
   </properties>
 
   <dependencies>