Add a project icon for IntelliJ IDEA

See gh-44424

Signed-off-by: Johnny Lim <izeye@naver.com>

.idea/.gitignore

@@ -1,8 +1,6 @@
 # Project name
 .name
 *.xml
-# Project icon
-icon.svg
 /modules/
 /shelf/
 /workspace.xml

.idea/icon.svg

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generator: Adobe Illustrator 24.0.3, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 510 457.8" style="enable-background:new 0 0 510 457.8;" xml:space="preserve">
+<style type="text/css">
+	.st0{fill:#6DB33F;}
+</style>
+<title>icon-spring-boot</title>
+<g id="Layer_2_1_">
+	<g id="Layer_1-2">
+		<path class="st0" d="M503.5,201.4L403,27.5C394.3,12.4,372.9,0,355.4,0H154.6c-17.4,0-38.9,12.4-47.6,27.5L6.6,201.4
+			c-8.7,15.1-8.7,39.8,0,54.9l100.4,174c8.7,15.1,30.1,27.5,47.6,27.5h200.9c17.4,0,38.8-12.4,47.6-27.5l100.4-174
+			C512.2,241.2,512.2,216.5,503.5,201.4z M233.3,96.2c0-11.4,9.3-20.7,20.7-20.7c11.4,0,20.7,9.3,20.7,20.7v123.7
+			c0,11.4-9.3,20.7-20.7,20.7c-11.4,0-20.7-9.3-20.7-20.7l0,0V96.2z M254,360.3c-77.4,0-140.4-63-140.4-140.4
+			c0.1-44.4,21.1-86.1,56.7-112.7c8.2-6.1,19.7-4.4,25.8,3.8s4.4,19.7-3.8,25.8l0,0c-45.9,34.1-55.5,99-21.4,144.9
+			s99,55.5,144.9,21.4c26.3-19.5,41.8-50.4,41.8-83.2c-0.1-32.9-15.7-63.8-42.2-83.4c-8.2-6-9.9-17.6-3.9-25.8s17.6-9.9,25.8-3.9
+			c35.9,26.5,57,68.5,57.1,113.1C394.4,297.4,331.4,360.3,254,360.3z"/>
+	</g>
+</g>
+</svg>