Add the Italian playtest edition (7.2.0, D53)

RULES.it.md translates RULES.md v0.9. edition/build.py renders a
printable A4 HTML (edition/it/playtest.html): quick reference, rules,
belt track, board overview and four board tiles drawn from the board
model (Tunnel pairs numbered, Dojo entrances marked), and the 22 Nebbia
cards. Adds markdown as a dev dependency.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

uv.lock

@@ -18,6 +18,7 @@ source = { editable = "." }
 
 [package.dev-dependencies]
 dev = [
+    { name = "markdown" },
     { name = "pytest" },
     { name = "ruff" },
 ]
@@ -26,6 +27,7 @@ dev = [
 
 [package.metadata.requires-dev]
 dev = [
+    { name = "markdown", specifier = ">=3.11" },
     { name = "pytest", specifier = ">=9.1.1" },
     { name = "ruff", specifier = ">=0.16.9" },
 ]
@@ -39,6 +41,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/cb/b1/3846dd7f199d53cb17f49cba7e651e9ce294d8497c8c150530ed11865bb8/iniconfig-2.3.0-py3-none-any.whl", hash = "sha256:f631c04d2c48c52b84d0d0549c99ff3859c98df65b3101406327ecc7d53fbf12", size = 7484, upload-time = "2025-10-18T21:55:41.639Z" },
 ]
 
+[[package]]
+name = "markdown"
+version = "3.11"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/f8/4f/700155c8c20d9e655dd0732b5fc3c7614f291b9148da271d7388e50bf774/markdown-3.11.tar.gz", hash = "sha256:180224db6aed87ba9ce1f2781ebcd5826253de8ff637112090e24b84502bbf9f", size = 485623, upload-time = "2026-09-25T13:46:23.473Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/ec/1e/32971905a7ab47f8b66866ed949fa48b104ba1c4a6fa57794c4f2c4b2cb8/markdown-3.11-py3-none-any.whl", hash = "sha256:cd6c89e7eb308c8b332ed673215a52d208a43f8bacc030b1419376129408719e", size = 111296, upload-time = "2026-09-25T13:46:22.163Z" },
+]
+
 [[package]]
 name = "packaging"
 version = "26.3"