Feat/save call tree as json

src/spaghettree/__main__.py

@@ -64,6 +64,8 @@ def run_process(
             new_root=new_root,
         ).unwrap()
     else:
+        # remove any new_root so that it doesn't try to use ruff on the json
+        new_root = ""
         adj_mat = AdjMat.from_call_tree_no_optimisation(call_tree).unwrap()
         print(  # noqa: T201
             yellow(

src/spaghettree/adapters/io_wrapper.py

@@ -12,6 +12,7 @@
 from ruff.__main__ import find_ruff_bin
 
 from spaghettree import Err, Ok, Result, safe
+from spaghettree.domain.optimisation import yellow
 from spaghettree.logger import logger
 
 
@@ -86,6 +87,7 @@ def write_files(
 
             logger.debug(f"{filepath = } {res = }")
             if res.is_ok():
+                print(yellow(f"File written to `{filepath}`"))  # noqa: T201
                 results[filepath] = res.inner
             else:
                 fails[filepath] = res