feat(bias): implement data models and storage for tool weighting and bias profiles

tool_presets.toml

@@ -23,3 +23,15 @@ categories.Python = [
  { name = "py_check_syntax", approval = "auto" },
  { name = "py_get_hierarchy", approval = "auto" }
 ]
+
+[bias_profiles.Balanced]
+tool_weights = {}
+category_multipliers = {}
+
+[bias_profiles.Execution-Focused]
+tool_weights = { run_powershell = 5 }
+category_multipliers = { Runtime = 1.5, Surgical = 1.2 }
+
+[bias_profiles.Discovery-Heavy]
+tool_weights = { web_search = 4, search_files = 4 }
+category_multipliers = { Web = 1.5, Analysis = 1.3 }