chore: standardize string quotes and fix import ordering across multiple modules

pr/plugins/loader.py

@@ -1,10 +1,11 @@
+import importlib.util
 import os
 import sys
-import importlib.util
-from typing import List, Dict, Callable, Any
+from typing import Callable, Dict, List
+
 from pr.core.logging import get_logger
 
-logger = get_logger('plugins')
+logger = get_logger("plugins")
 
 PLUGINS_DIR = os.path.expanduser("~/.pr/plugins")
 
@@ -21,7 +22,7 @@ class PluginLoader:
             logger.info("No plugins directory found")
             return []
 
-        plugin_files = [f for f in os.listdir(PLUGINS_DIR) if f.endswith('.py')]
+        plugin_files = [f for f in os.listdir(PLUGINS_DIR) if f.endswith(".py")]
 
         for plugin_file in plugin_files:
             try:
@@ -44,16 +45,20 @@ class PluginLoader:
         sys.modules[plugin_name] = module
         spec.loader.exec_module(module)
 
-        if hasattr(module, 'register_tools'):
+        if hasattr(module, "register_tools"):
             tools = module.register_tools()
             if isinstance(tools, list):
                 self.plugin_tools.extend(tools)
                 self.loaded_plugins[plugin_name] = module
                 logger.info(f"Loaded plugin: {plugin_name} ({len(tools)} tools)")
             else:
-                logger.warning(f"Plugin {plugin_name} register_tools() did not return a list")
+                logger.warning(
+                    f"Plugin {plugin_name} register_tools() did not return a list"
+                )
         else:
-            logger.warning(f"Plugin {plugin_name} does not have register_tools() function")
+            logger.warning(
+                f"Plugin {plugin_name} does not have register_tools() function"
+            )
 
     def get_plugin_function(self, tool_name: str) -> Callable:
         for plugin_name, module in self.loaded_plugins.items():
@@ -67,7 +72,7 @@ class PluginLoader:
 
 
 def create_example_plugin():
-    example_plugin = os.path.join(PLUGINS_DIR, 'example_plugin.py')
+    example_plugin = os.path.join(PLUGINS_DIR, "example_plugin.py")
 
     if os.path.exists(example_plugin):
         return
@@ -121,7 +126,7 @@ def register_tools():
 
     try:
         os.makedirs(PLUGINS_DIR, exist_ok=True)
-        with open(example_plugin, 'w') as f:
+        with open(example_plugin, "w") as f:
             f.write(example_code)
         logger.info(f"Created example plugin at {example_plugin}")
     except Exception as e: