feat(java): add kmp-lsp as an alternative language server (#1891)

crates/ide-language/src/registry.rs

@@ -639,6 +639,7 @@ mod tests {
         for (lang, servers) in [
             ("python", vec!["basedpyright", "pyright", "ty", "pyrefly"]),
             ("typescript", vec!["vtsls", "typescript-language-server"]),
+            ("java", vec!["jdtls", "kmp-lsp"]),
         ] {
             let cfg = reg.get(&LanguageId::new(lang)).unwrap();
             let got: Vec<(&str, bool)> = cfg