💄🔧 Split out the Towncrier config

This makes in more obvious where the config is for a specific tool.
And it makes easier to synchronize separate configs across
repositories separately.

pyproject.toml

@@ -62,75 +62,6 @@ linetrace = "True"  # Implies `profile=True`
 #error_on_unknown_names = "True"
 #error_on_uninitialized = "True"
 
-[tool.towncrier]
-  package = "frozenlist"
-  filename = "CHANGES.rst"
-  directory = "CHANGES/"
-  title_format = "v{version}"
-  template = "CHANGES/.TEMPLATE.rst"
-  issue_format = "{issue}"
-
-  # NOTE: The types are declared because:
-  # NOTE: - there is no mechanism to override just the value of
-  # NOTE:   `tool.towncrier.type.misc.showcontent`;
-  # NOTE: - and, we want to declare extra non-default types for
-  # NOTE:   clarity and flexibility.
-
-  [[tool.towncrier.section]]
-    path = ""
-
-  [[tool.towncrier.type]]
-    # Something we deemed an improper undesired behavior that got corrected
-    # in the release to match pre-agreed expectations.
-    directory = "bugfix"
-    name = "Bug fixes"
-    showcontent = true
-
-  [[tool.towncrier.type]]
-    # New behaviors, public APIs. That sort of stuff.
-    directory = "feature"
-    name = "Features"
-    showcontent = true
-
-  [[tool.towncrier.type]]
-    # Declarations of future API removals and breaking changes in behavior.
-    directory = "deprecation"
-    name = "Deprecations (removal in next major release)"
-    showcontent = true
-
-  [[tool.towncrier.type]]
-    # When something public gets removed in a breaking way. Could be
-    # deprecated in an earlier release.
-    directory = "breaking"
-    name = "Removals and backward incompatible breaking changes"
-    showcontent = true
-
-  [[tool.towncrier.type]]
-    # Notable updates to the documentation structure or build process.
-    directory = "doc"
-    name = "Improved documentation"
-    showcontent = true
-
-  [[tool.towncrier.type]]
-    # Notes for downstreams about unobvious side effects and tooling. Changes
-    # in the test invocation considerations and runtime assumptions.
-    directory = "packaging"
-    name = "Packaging updates and notes for downstreams"
-    showcontent = true
-
-  [[tool.towncrier.type]]
-    # Stuff that affects the contributor experience. e.g. Running tests,
-    # building the docs, setting up the development environment.
-    directory = "contrib"
-    name = "Contributor-facing changes"
-    showcontent = true
-
-  [[tool.towncrier.type]]
-    # Changes that are hard to assign to any of the above categories.
-    directory = "misc"
-    name = "Miscellaneous internal changes"
-    showcontent = true
-
 [tool.cibuildwheel]
 build-frontend = "build"
 before-test = [

towncrier.toml

@@ -0,0 +1,68 @@
+[tool.towncrier]
+  package = "frozenlist"
+  filename = "CHANGES.rst"
+  directory = "CHANGES/"
+  title_format = "v{version}"
+  template = "CHANGES/.TEMPLATE.rst"
+  issue_format = "{issue}"
+
+  # NOTE: The types are declared because:
+  # NOTE: - there is no mechanism to override just the value of
+  # NOTE:   `tool.towncrier.type.misc.showcontent`;
+  # NOTE: - and, we want to declare extra non-default types for
+  # NOTE:   clarity and flexibility.
+
+  [[tool.towncrier.section]]
+    path = ""
+
+  [[tool.towncrier.type]]
+    # Something we deemed an improper undesired behavior that got corrected
+    # in the release to match pre-agreed expectations.
+    directory = "bugfix"
+    name = "Bug fixes"
+    showcontent = true
+
+  [[tool.towncrier.type]]
+    # New behaviors, public APIs. That sort of stuff.
+    directory = "feature"
+    name = "Features"
+    showcontent = true
+
+  [[tool.towncrier.type]]
+    # Declarations of future API removals and breaking changes in behavior.
+    directory = "deprecation"
+    name = "Deprecations (removal in next major release)"
+    showcontent = true
+
+  [[tool.towncrier.type]]
+    # When something public gets removed in a breaking way. Could be
+    # deprecated in an earlier release.
+    directory = "breaking"
+    name = "Removals and backward incompatible breaking changes"
+    showcontent = true
+
+  [[tool.towncrier.type]]
+    # Notable updates to the documentation structure or build process.
+    directory = "doc"
+    name = "Improved documentation"
+    showcontent = true
+
+  [[tool.towncrier.type]]
+    # Notes for downstreams about unobvious side effects and tooling. Changes
+    # in the test invocation considerations and runtime assumptions.
+    directory = "packaging"
+    name = "Packaging updates and notes for downstreams"
+    showcontent = true
+
+  [[tool.towncrier.type]]
+    # Stuff that affects the contributor experience. e.g. Running tests,
+    # building the docs, setting up the development environment.
+    directory = "contrib"
+    name = "Contributor-facing changes"
+    showcontent = true
+
+  [[tool.towncrier.type]]
+    # Changes that are hard to assign to any of the above categories.
+    directory = "misc"
+    name = "Miscellaneous internal changes"
+    showcontent = true