Add verbose flag, WireViz dev dep, and rendered diagram examples

- Gate model/value heuristic output behind --verbose/-v flag (quiet by default)
- Add wireviz>=0.4 as dev dependency for roundtrip render tests
- Generate SVG/PNG diagram renders for inter_module, single_module, hierarchical
- Embed rendered diagrams in README with layout optimization callout

uv.lock

@@ -285,6 +285,15 @@ wheels = [
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 ]
 
+[[package]]
+name = "graphviz"
+version = "0.21"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/f8/b3/3ac91e9be6b761a4b30d66ff165e54439dcd48b83f4e20d644867215f6ca/graphviz-0.21.tar.gz", hash = "sha256:20743e7183be82aaaa8ad6c93f8893c923bd6658a04c32ee115edb3c8a835f78", size = 200434, upload-time = "2025-06-15T09:35:05.824Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/91/4c/e0ce1ef95d4000ebc1c11801f9b944fa5910ecc15b5e351865763d8657f8/graphviz-0.21-py3-none-any.whl", hash = "sha256:54f33de9f4f911d7e84e4191749cac8cc5653f815b06738c54db9a15ab8b1e42", size = 47300, upload-time = "2025-06-15T09:35:04.433Z" },
+]
+
 [[package]]
 name = "iniconfig"
 version = "2.3.0"
@@ -1010,6 +1019,7 @@ dev = [
     { name = "pytest" },
     { name = "pytest-cov" },
     { name = "ruff" },
+    { name = "wireviz" },
 ]
 
 [package.metadata]
@@ -1021,6 +1031,7 @@ requires-dist = [
     { name = "pyyaml", specifier = ">=6.0" },
     { name = "ruff", marker = "extra == 'dev'" },
     { name = "spicelib", marker = "extra == 'asc'", specifier = ">=1.4.9" },
+    { name = "wireviz", marker = "extra == 'dev'", specifier = ">=0.4" },
 ]
 provides-extras = ["asc", "dev"]
 
@@ -1114,3 +1125,18 @@ sdist = { url = "https://files.pythonhosted.org/packages/55/e3/70399cb7dd41c10ac
 wheels = [
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 ]
+
+[[package]]
+name = "wireviz"
+version = "0.4.1"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "click" },
+    { name = "graphviz" },
+    { name = "pillow" },
+    { name = "pyyaml" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/68/31/26e518535ae54f540dae0e83e583240d4bae9a883a6213d751b7b0c00304/wireviz-0.4.1.tar.gz", hash = "sha256:0e25ad8c2e3a269a7dd4a7f45e4e8d304db7e0432b1843a620acfa6be70570e1", size = 50281, upload-time = "2024-07-13T11:29:30.319Z" }
+wheels = [
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+]