[Improvement]: Bal CLI tool to cannot be written in ballerina

[niveathika]

Description

Currently, the bal tools need to be in java.

This is a restriction since logic cannot be written in ballerina as we have done in edi-tool (ballerina-platform/ballerina-library#6473). Due to this we need a java dependency.

We need a way to write a tool in ballerina

[azinneera]

As per the offline discussion with @niveathika the requirement of Java for the execution of the tool is because of the way the tool's execution is written. Since the tool is written in Ballerina, an executable JAR is built and it is executed via a ProcessBuilder using the java -jar command. This is the reason for the dependency on Java.

The most ideal solution would be to be able to support tools written in Ballerina but this is not feasible to do in the near future since all the compiler APIs are written in Ballerina.

An alternative solution would be to use the JDK packed with the distribution. For this, we would need to introduce a bal command to get the JDK path used for the particular distribution which can be used to execute the EDI tool. @keizer619 @sameerajayasoma WDYT?