📝 docs(playbook): add contributing and multi-language standards

Introduce C++ and Python docs/templates and split .agents rulesets by language (tsl/cpp/python).

Move commit message guidance to CONTRIBUTING.md (full spec remains in docs/common/commit_message.md).

templates/python/.pylintrc

@@ -0,0 +1,64 @@
+[MASTER]
+jobs=0
+ignore=CVS,.git,__pycache__,.venv,venv
+init-hook='import sys; sys.path.append(".")'
+
+[MESSAGES CONTROL]
+disable=
+    C0103,  # 变量名不符合命名规范（允许简短的变量名）
+    C0114,  # 缺少模块文档字符串
+    R0913,  # 参数过多
+    R0902,  # 实例属性过多
+    W0511,  # TODO 注释
+
+enable=
+    E,
+    W,
+
+[REPORTS]
+output-format=colorized
+reports=no
+
+[BASIC]
+argument-naming-style=snake_case
+attr-naming-style=snake_case
+class-attribute-naming-style=any
+class-naming-style=PascalCase
+const-naming-style=UPPER_CASE
+function-naming-style=snake_case
+method-naming-style=snake_case
+module-naming-style=snake_case
+variable-naming-style=snake_case
+
+good-names=i,j,k,ex,Run,_,x,y,z,fd,id
+docstring-min-length=5
+
+[FORMAT]
+max-line-length=80
+max-module-lines=1000
+indent-string='    '
+indent-after-paren=4
+
+[DESIGN]
+max-args=7
+max-attributes=10
+max-branches=15
+max-locals=20
+max-returns=6
+max-statements=50
+min-public-methods=1
+
+[IMPORTS]
+import-graph=
+ext-import-graph=
+int-import-graph=
+
+[CLASSES]
+valid-metaclass-classmethod-first-arg=cls
+valid-classmethod-first-arg=cls
+
+[EXCEPTIONS]
+overgeneral-exceptions=
+    builtins.BaseException,
+    builtins.Exception
+