Adjust claude-code context

* Keep the replace_content tool enabled
 * Instruct the agent to use Serena's editing tools, especially
   when editing code that was read through Serena

This is in reaction to Claude Code's editing tool denying edits
without corresponding prior reads

Resolves #1400

src/serena/resources/config/contexts/claude-code.yml

@@ -7,16 +7,15 @@ prompt: |
   **IMPORTANT**: If you haven't seen Serena's tools yet, you should use the tool search tool to load all of them
   right now.
   For exploring and reading code in a token-efficient manner, use Serena's code-centric overview and symbolic search tools.
-  For edits, where it makes sense, use Serena's editing tools since they are more token efficient.
-  Use your own editing tools only if Serena's editing tools would be suboptimal.
-  **IMPORTANT**: Never use a tool before reading its schema via the tool-search tool!
+  For edits, prefer Serena's editing tools since they are more token efficient.
+  Especially when editing code you have read through Serena, ALWAYS use Serena's tools for editing, because your built-in tools will deny such edits (they will assume you haven't read the content).
+  **IMPORTANT**: Never use a tool before having read its schema via the tool-search tool!
   
 
 excluded_tools:
   - create_text_file
   - read_file
   - execute_shell_command
-  - replace_content
   - find_file
   - list_dir
   - search_for_pattern