[FL-3174] Dolphin builder in ufbt; minor ufbt/fbt improvements (#2601)

* ufbt: added "dolphin_ext" target (expects "external" subfolder in cwd with dolphin assets); cleaned up unused code
* ufbt: codestyle fixes
* scripts: fixed style according to ruff linter
* scripts: additional cleanup & codestyle fixes
* github: pass target hw code when installing local SDK with ufbt
* ufbt: added error message for missing folder in dolphin builder
* scripts: more linter fixes
* sdk: added flipper_format_stream; ufbt: support for --extra-define
* fbt: reduced amount of global defines
* scripts, fbt: rearranged imports

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

scripts/fbt/appmanifest.py

@@ -1,7 +1,7 @@
-from dataclasses import dataclass, field
-from typing import List, Optional, Tuple, Callable
-from enum import Enum
 import os
+from dataclasses import dataclass, field
+from enum import Enum
+from typing import Callable, List, Optional, Tuple
 
 
 class FlipperManifestException(Exception):
@@ -93,7 +93,7 @@ class AppManager:
     def get(self, appname: str):
         try:
             return self.known_apps[appname]
-        except KeyError as _:
+        except KeyError:
             raise FlipperManifestException(
                 f"Missing application manifest for '{appname}'"
             )
@@ -223,6 +223,7 @@ class AppBuildset:
         return self.appmgr.get(app_name).supports_hardware_target(self.hw_target)
 
     def _get_app_depends(self, app_name: str) -> List[str]:
+        app_def = self.appmgr.get(app_name)
         # Skip app if its target is not supported by the target we are building for
         if not self._check_if_app_target_supported(app_name):
             self._writer(
@@ -230,7 +231,6 @@ class AppBuildset:
             )
             return []
 
-        app_def = self.appmgr.get(app_name)
         return list(
             filter(
                 self._check_if_app_target_supported,
@@ -296,7 +296,7 @@ class AppBuildset:
                 try:
                     parent_app = self.appmgr.get(parent_app_id)
                     parent_app._plugins.append(extension_app)
-                except FlipperManifestException as e:
+                except FlipperManifestException:
                     self._writer(
                         f"Module {extension_app.appid} has unknown parent {parent_app_id}"
                     )