chore: add stable release scripts

scripts/release/stable/changelog.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+# show changes since the last version tag and bump version
+# --------------------------------------------------------
+git cliff -u --bump

scripts/release/stable/create.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+version="$(git cliff --bumped-version)"
+n_version="$(git cliff --bumped-version | sed -e 's/^v//')"
+
+# show changes since last release (ignoring nightly) and tag current HEAD with
+# bumped version
+# ----------------------------------------------------------------------------
+./scripts/release/stable/changelog.sh > CHANGELOG.md
+git tag -f "$version"
+git push --tags --force
+
+# delete last nightly release and create new nightly release from changelog
+# create release with:
+# - *title*: number of version
+# - *tag*: version
+# - *branch|target*: version
+# -------------------------------------------------------------------------
+[[ $FORCE -gt 0 ]] && gh release delete "$n_version" -y
+gh release create "$n_version" -t "$version" -F CHANGELOG.md