chore: update description and dependencies

Signed-off-by: Fred Bricon <fbricon@gmail.com>

README.md

@@ -3,9 +3,9 @@
 ## Description
 <!-- Plugin description -->
 
-LSP4IJ is a free and open-source [Language Server protocol (LSP)](https://microsoft.github.io/language-server-protocol/) client compatible with all flavours of IntelliJ.
+LSP4IJ is a free and open-source [Language Server protocol (LSP)](https://microsoft.github.io/language-server-protocol/) client compatible with all flavours of IntelliJ.  
 
-<!-- Plugin description end -->
+It currently doesn't provide any useful functionality on its own, but is instead used as a dependency for other extensions, willing to integrate language servers with IntelliJ products.
 
 LSP4IJ provides:
 
@@ -19,6 +19,7 @@ LSP4IJ provides:
 * a `Language Servers settings page` to configure the LSP trace level, the debug port to use to debug language server:
 
 ![Language Server settings](docs/images/LanguageServerSettings.png)
+<!-- Plugin description end -->
 
 ## Who is using LSP4IJ?
 

src/main/resources/META-INF/plugin.xml

@@ -13,6 +13,9 @@
   ]]>
   </change-notes>
   <depends>com.intellij.modules.platform</depends>
+  <!-- FIXME we shouldn't have a dependency to Java, this is caused by using 'LightRecordField' (e.g. in LSPIJUtils.getNavigationElement(PsiElement)) -->
+  <depends>com.intellij.modules.java</depends>
+  <depends>com.redhat.devtools.intellij.telemetry</depends>
 
 
   <!-- please see http://www.jetbrains.org/intellij/sdk/docs/basics/getting_started/build_number_ranges.html for description -->