Record the correspondence between API methods and tools

FacadeMethodInfo gains corresponding_tool (the tool class offering the same functionality) and
get_corresponding_tool_name, and every API method with a tool counterpart names it in its
facade_method decorator. This enables applying tool-level exclusions to API methods and rendering
prompt conditions based on tools.

Since the API modules now refer to the tool classes, the tools import the APIs locally (in the
mixins' _api methods), and the symbol tools' symbol_dict_grouper attributes become properties.

test/serena/test_repl_tool.py

@@ -11,7 +11,7 @@ from serena.config.serena_config import ApiInclusionDefinition
 from serena.repl.api.lsp_api import LspApi
 from serena.repl.facade import ApiScope, Facade, FacadeApi, FacadeMethodInfo, facade_method
 from serena.repl.repl import SerenaRepl
-from serena.tools import SerenaReplTool
+from serena.tools import FindSymbolTool, SerenaReplTool
 from solidlsp.ls_config import LanguageServerId
 from test.conftest import agent_for_project_context
 
@@ -165,6 +165,15 @@ class TestFacade:
         facade = Facade.from_api(self.DummyApi(MagicMock()), self._scope(included_apis=["dummy.extra"]))
         assert "extra" in facade.enabled_method_names
 
+    def test_corresponding_tool(self) -> None:
+        facade = Facade.from_api(self.DummyApi(MagicMock()), ApiScope())
+        assert facade.get_method("add").info.get_corresponding_tool_name() is None
+
+        lsp_facade = Facade.from_api(LspApi(MagicMock()), ApiScope())
+        info = lsp_facade.get_method("find_symbol").info
+        assert info.corresponding_tool is FindSymbolTool
+        assert info.get_corresponding_tool_name() == "find_symbol"
+
     def test_method_info_mirrors_decorator(self) -> None:
         facade = Facade.from_api(self.DummyApi(MagicMock()), ApiScope())
         assert facade.get_method("add").info == FacadeMethodInfo(name="add")