Rename Red Knot (#17820)

crates/ty_python_semantic/resources/mdtest/mdtest_config.md

@@ -0,0 +1,77 @@
+This test makes sure that `ty_test` correctly parses the TOML configuration blocks and applies the
+correct settings hierarchically.
+
+The following configuration will be attached to the *root* section (without any heading):
+
+```toml
+[environment]
+python-version = "3.10"
+```
+
+# Basic
+
+Here, we simply make sure that we pick up the global configuration from the root section:
+
+```py
+import sys
+
+reveal_type(sys.version_info[:2] == (3, 10))  # revealed: Literal[True]
+```
+
+# Inheritance
+
+## Child
+
+### Grandchild
+
+The same should work for arbitrarily nested sections:
+
+```py
+import sys
+
+reveal_type(sys.version_info[:2] == (3, 10))  # revealed: Literal[True]
+```
+
+# Overwriting
+
+Here, we make sure that we can overwrite the global configuration in a child section:
+
+```toml
+[environment]
+python-version = "3.11"
+```
+
+```py
+import sys
+
+reveal_type(sys.version_info[:2] == (3, 11))  # revealed: Literal[True]
+```
+
+# No global state
+
+There is no global state. This section should again use the root configuration:
+
+```py
+import sys
+
+reveal_type(sys.version_info[:2] == (3, 10))  # revealed: Literal[True]
+```
+
+# Overwriting affects children
+
+Children in this section should all use the section configuration:
+
+```toml
+[environment]
+python-version = "3.12"
+```
+
+## Child
+
+### Grandchild
+
+```py
+import sys
+
+reveal_type(sys.version_info[:2] == (3, 12))  # revealed: Literal[True]
+```