docs: use neutral code block for Claude Code plugin commands

Agent-Logs-Url: https://github.com/flox/floxdocs/sessions/c0146a08-ad9f-4a3b-8b52-410c31081a73

Co-authored-by: djsauble <186715+djsauble@users.noreply.github.com>

Author: Copilot

docs/install-flox/ide-extensions.md

@@ -83,11 +83,11 @@ description: IDE extensions and AI agent integrations for Flox
     The Flox Agentic plugin for Claude Code adds seven expert
     skills and configures the MCP connection automatically:
 
-    ```{ .sh .code-command .copy }
+    ```{ .copy }
     /plugin marketplace add flox/flox-agentic
     ```
 
-    ```{ .sh .code-command .copy }
+    ```{ .copy }
     /plugin install flox@flox-agentic
     ```