fix(release): add non-mutating changelog previews

docs/CHANGELOG_PREVIEW.mdadded+23-0

Changes to docs/CHANGELOG_PREVIEW.md

		@@ -0,0 +1,23 @@
	1	+# Preview release notes safely
	2	+
	3	+After `bun install`, preview changes since the latest reachable tag without
	4	+writing release notes into the checkout:
	5	+
	6	+```sh
	7	+bun run changelog:preview
	8	+bun run changelog:preview --from v0.0.92 --to HEAD
	9	+```
	10	+
	11	+The preview resolves both refs to commits, directs the installed logsmith CLI
	12	+to an isolated temporary file, prints its contents, and removes that temporary
	13	+directory. Existing edits to `CHANGELOG.md` are preserved. Only `--from` and
	14	+`--to` are accepted; output overrides are deliberately unavailable.
	15	+
	16	+Do not use logsmith 0.2.3's `--no-output` for a dry preview: its CLI currently
	17	+writes `CHANGELOG.md` despite that flag. This command is a Craft workaround,
	18	+not a fix to the upstream parser or its duplicate issue-reference rendering
	19	+(tracked in [#283](https://github.com/craft-native/craft/issues/283)). Review
	20	+generated issue links before releasing.
	21	+
	22	+`bun run changelog:generate` remains the intentional command for updating
	23	+`CHANGELOG.md`. Neither command publishes packages or creates a release tag.