Refine warnings (#13499)

Author: koppor

docs/getting-into-the-code/guidelines-for-setting-up-a-local-workspace/eclipse.md

@@ -6,6 +6,11 @@ nav_order: 90
 
 # Advanced: Eclipse as IDE
 
+{: .important }
+> Following is currently not possible.
+>
+> We keep this page as basis for future work.
+
 For advanced users, [Eclipse](https://eclipse.org) (`2023-03` or newer) is also possible.
 On Ubuntu Linux, you can follow the [documentation from the Ubuntu Community](https://help.ubuntu.com/community/EclipseIDE#Download_Eclipse) or the [step-by-step guideline from Krizna](https://www.krizna.com/ubuntu/install-eclipse-in-ubuntu-12-04/) to install Eclipse.
 On Windows, download it from [www.eclipse.org](http://www.eclipse.org/downloads/) and run the installer.

docs/getting-into-the-code/guidelines-for-setting-up-a-local-workspace/intellij-89-run-with-intellij.md

@@ -6,7 +6,10 @@ nav_order: 89
 
 # Advanced: Build and run using IntelliJ IDEA
 
-Following is currently not possible due to [IDEA-3733059](https://youtrack.jetbrains.com/issue/IDEA-373305).
+{: .important }
+> Following is currently not possible due to [IDEA-3733059](https://youtrack.jetbrains.com/issue/IDEA-373305).
+>
+> We keep this page as basis for future work.
 
 In "Step 2: Setup the build system: JDK and Gradle", IntelliJ was configured to use Gradle as tool for launching JabRef.
 It is also possible to use IntelliJ's internal build and run system to launch JabRef.

docs/getting-into-the-code/guidelines-for-setting-up-a-local-workspace/vscode.md

@@ -6,9 +6,13 @@ nav_order: 91
 
 # Advanced: VS Code as IDE
 
-We are working on supporting VS Code for development.
-There is basic support, but important things such as our code conventions are not in place.
-Thus, use at your own risk.
+> {: .warning }
+> We do not recommend using VS Code, because it does not offer all important features essential for JabRef development.
+
+{: .important }
+> We are working on supporting VS Code for development.
+> There is basic support, but important things such as our code conventions are not in place.
+> Thus, use at your own risk.
 
 Quick howto: