feat: add sts4 (#2)

* feat: add sts4 jars

* fix(sts4): wrong license name

packages/sts4/package.yaml

@@ -0,0 +1,22 @@
+---
+name: sts4
+description: |
+ Spring Tools 4 is the next generation of Spring tooling for your favorite coding environment.
+ Largely rebuilt from scratch, it provides world-class support for developing Spring-based enterprise
+ applications.
+
+homepage: https://github.com/spring-projects/sts4
+licenses:
+ - EPL-1.0
+languages:
+ - Java
+categories:
+ - LSP
+
+source:
+ id: pkg:github/spring-projects/[email protected]
+ asset:
+ file: vscode-spring-boot-1.50.0-RC.2.vsix
+
+share:
+ sts4/: extension/jars/