Issue Description:

https://github.com/kiegroup/drools-lsp/pull/14#discussion_r1105852515

Currently extension.ts depends on the path `drools-lsp-server/target`.

        let serverJar = path.join(__dirname, '..', '..', 'drools-lsp-server', 'target', 'drools-lsp-server-jar-with-dependencies.jar');

Acceptance Criteria:

Pack drools-lsp-server-jar-with-dependencies.jar into VSIX, so the path to drools-lsp-server-jar-with-dependencies.jar wouldn't matter.

Additional Information:

Check other tools team extensions