Added context file for copilot plugin in JB IDEs

src/serena/resources/config/contexts/jb-copilot-plugin.yml

@@ -0,0 +1,27 @@
+description: Generic IDE coding agent context (basic file operations and shell operations assumed to be covered; single project mode)
+prompt: |
+  In addition to Serena's tools, you have access to internal tools, including for, basic (line-based) edits and reads, 
+  and shell commands.
+  
+  If Serena's tools can be used to achieve your task, you should prioritize them.
+  In particular, it is important that you avoid reading entire source code files unless it is strictly necessary!
+  Instead, for exploring and reading code in a token-efficient manner, use Serena's overview and symbolic search tools.
+  For non-code files or for reads where you don't know the symbol's name path, you can use the pattern search tool.
+  
+  Make sure to first activate the working directory as using Serena's `activate_project` tool and to read initial
+  instructions (if not done so already) with the `initial_instructions` tool.
+
+excluded_tools:
+  - create_text_file
+  - read_file
+  - execute_shell_command
+
+tool_description_overrides: {}
+
+# whether to assume that Serena shall only work on a single project in this context (provided that a project is given
+# when Serena is started).
+# If set to true and a project is provided at startup, the set of tools is limited to those required by the project's
+# concrete configuration, and other tools are excluded completely, allowing the set of tools to be minimal.
+# Tools explicitly disabled by the project will not be available at all.
+# The `activate_project` tool is always disabled in this case, as project switching cannot be allowed.
+single_project: true