feat: use tomli-w for config dumps (#103)

uv.lock

@@ -581,6 +581,7 @@ dependencies = [
     { name = "rich" },
     { name = "structlog" },
     { name = "sulguk" },
+    { name = "tomli-w" },
     { name = "typer" },
     { name = "watchfiles" },
 ]
@@ -607,6 +608,7 @@ requires-dist = [
     { name = "rich", specifier = ">=14.2.0" },
     { name = "structlog", specifier = ">=25.5.0" },
     { name = "sulguk", specifier = ">=0.11.1" },
+    { name = "tomli-w", specifier = ">=1.2.0" },
     { name = "typer", specifier = ">=0.21.0" },
     { name = "watchfiles", specifier = ">=0.21.0" },
 ]
@@ -620,6 +622,15 @@ dev = [
     { name = "ty", specifier = ">=0.0.8" },
 ]
 
+[[package]]
+name = "tomli-w"
+version = "1.2.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/19/75/241269d1da26b624c0d5e110e8149093c759b7a286138f4efd61a60e75fe/tomli_w-1.2.0.tar.gz", hash = "sha256:2dd14fac5a47c27be9cd4c976af5a12d87fb1f0b4512f81d69cce3b35ae25021", size = 7184, upload-time = "2025-01-15T12:07:24.262Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/c7/18/c86eb8e0202e32dd3df50d43d7ff9854f8e0603945ff398974c1d91ac1ef/tomli_w-1.2.0-py3-none-any.whl", hash = "sha256:188306098d013b691fcadc011abd66727d3c414c571bb01b1a174ba8c983cf90", size = 6675, upload-time = "2025-01-15T12:07:22.074Z" },
+]
+
 [[package]]
 name = "tqdm"
 version = "4.67.1"