feat: improve release script with dry-run and version increments

.continue/rules/project.md

@@ -0,0 +1,19 @@
+---
+description: mtm-ddwipe project conventions
+---
+
+# Project conventions
+- Use English throughout the project.
+- Keep shell scripts Bash-based when Bash is already used by the project.
+- Preserve the current behavior of the main script:
+  - `mtm-ddwipe`: wipe devices.
+- Keep user-facing messages short, clear, and in English.
+- Prefer minimal, focused changes that do not alter the intent of the existing scripts, unless the script behavior is intentionally updated.
+- Maintain `.continue/rules/project.md` whenever project conventions or script behavior change.
+- `mtm-ddwipe` is a small Bash script with helper functions.
+- Keep the host and line-number removal behavior intact.
+- `mtm-ddwipe` must print a usage line and support `-h`/`--help`.
+
+# Project identity
+- Main script: `mtm-ddwipe`
+- License: GNU GPL v3