chore: Add templates for changelog and release notes

Signed-off-by: Sietze van Buuren <s.van.buuren@gmail.com>

.github/templates/.release_notes.md.j2

@@ -0,0 +1,28 @@
+{#
+
+## vX.X.X (YYYY-MMM-DD)
+
+#}{{
+
+      "## %s (%s)\n" | format(
+        release.version.as_semver_tag(),
+        release.tagged_date.strftime("%Y-%m-%d")
+      )
+
+}}{%  set commit_objects = release["elements"] | dictsort
+%}{#
+#}{%  for type_, commits in commit_objects
+%}{{
+        "\n### %s\n" | format(type_ | title)
+
+}}{%    for commit in commits
+%}{{
+          "\n* %s ([`%s`](%s))\n" | format(
+              commit.descriptions[0].rstrip(),
+              commit.short_hash,
+              commit.hexsha | commit_hash_url,
+          )
+
+}}{%    endfor
+%}{%  endfor
+%}

.github/templates/CHANGELOG.md.j2

@@ -0,0 +1,24 @@
+# CHANGELOG
+
+{%    for version, release in ctx.history.released.items()
+%}{{
+        "## %s (%s)\n" | format(version.as_tag(), release.tagged_date.strftime("%Y-%m-%d"))
+
+}}{%  set commit_objects = release["elements"] | dictsort
+%}{#
+#}{%    for type_, commits in commit_objects if type_ != "unknown"
+%}{{
+          "\n### %s\n" | format(type_ | title)
+
+}}{%      for commit in commits
+%}{{
+          "\n* %s ([`%s`](%s))\n" | format(
+              commit.descriptions[0].rstrip(),
+              commit.short_hash,
+              commit.hexsha | commit_hash_url
+          )
+
+}}{%      endfor
+%}{%    endfor
+%}{%  endfor
+%}

pyproject.toml

@@ -36,3 +36,6 @@ include = ["simple_cdd_yaml", "simple_cdd_yaml.*"]
 [tool.semantic_release]
 version_variables = ["simple_cdd_yaml/__init__.py:__version__"]
 version_toml = ["pyproject.toml:project.version"]
+
+[tool.semantic_release.changelog]
+template_dir = ".github/templates"