add basic helloworld

.idea/.gitignore

+# Default ignored files
+/shelf/
+/workspace.xml
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# Editor-based HTTP Client requests
+/httpRequests/

.idea/learngo.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file

.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_15" project-jdk-name="15" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file

.idea/modules.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/learngo.iml" filepath="$PROJECT_DIR$/.idea/learngo.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

.idea/watcherTasks.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectTasksOptions">
+    <TaskOptions isEnabled="true">
+      <option name="arguments" value="-w $FilePath$" />
+      <option name="checkSyntaxErrors" value="true" />
+      <option name="description" />
+      <option name="exitCodeBehavior" value="ERROR" />
+      <option name="fileExtension" value="go" />
+      <option name="immediateSync" value="false" />
+      <option name="name" value="goimports" />
+      <option name="output" value="$FilePath$" />
+      <option name="outputFilters">
+        <array />
+      </option>
+      <option name="outputFromStdout" value="false" />
+      <option name="program" value="goimports" />
+      <option name="runOnExternalChanges" value="false" />
+      <option name="scopeName" value="Project Files" />
+      <option name="trackOnlyRoot" value="true" />
+      <option name="workingDir" value="$ProjectFileDir$" />
+      <envs>
+        <env name="GOROOT" value="$GOROOT$" />
+        <env name="GOPATH" value="$GOPATH$" />
+        <env name="PATH" value="$GoBinDirs$" />
+      </envs>
+    </TaskOptions>
+  </component>
+</project>
\ No newline at end of file

go.mod

+module "learngo"
\ No newline at end of file

learngo.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="Go" enabled="true" />
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file