Run ShakeTune as an in-process Klipper module (#100)

* feat: Run ShakeTune as an in-process Klipper module
* feat: install shaketune dependencies to klipper venv
* refactor: replace print_with_c_locale with klipper console output with stdout fallback

shaketune/helpers/console_output.py

@@ -0,0 +1,24 @@
+import io
+from typing import Callable, Optional
+
+
+class ConsoleOutput:
+    """
+    Print output to stdout or to an alternative like the Klipper console through a callback
+    """
+
+    _output_func: Optional[Callable[[str], None]] = None
+
+    @classmethod
+    def register_output_callback(cls, output_func: Optional[Callable[[str], None]]):
+        cls._output_func = output_func
+
+    @classmethod
+    def print(cls, *args, **kwargs):
+        if not cls._output_func:
+            print(*args, **kwargs)
+            return
+
+        with io.StringIO() as mem_output:
+            print(*args, file=mem_output, **kwargs)
+            cls._output_func(mem_output.getvalue())