misc: Add release HOWTO and update NEWS

Author: swick

NEWS.md

@@ -1,3 +1,8 @@
+Changes in 0.2.0
+=================
+Released: Not yet
+
+
 Changes in 0.1.0
 =================
 Released: 2025-03-26

RELEASE_HOWTO.md

@@ -0,0 +1,46 @@
+# Steps for doing a xdg-native-messaging-proxy release
+
+### Prepare the release
+
+- Make sure the version in `meson.build` is correct
+- Create a branch
+```sh
+$ git checkout -b release-${version}
+```
+- Add your changelog to the `NEWS.md` file
+```sh
+$ git add NEWS.md
+$ git commit -m ${version}
+```
+- Push your branch
+```sh
+$ git push -u ${fork} release-${version}
+```
+- Open a pull request
+
+### Create a Signed Tag
+
+**NOTE**: Only project maintainers can create a tag.
+
+Make sure that:
+ - You're on the `main` branch, or a stable branch;
+ - The tip of the branch is a release commit (e.g. `1.19.4`)
+ - The version in `meson.build` is correct
+
+Then create the tag:
+
+```sh
+$ git evtag sign ${version}
+$ git push -u origin ${version}
+```
+
+### Post-Release
+
+- Update version number in `meson.build` to the next release version
+- Start a new section in `NEWS.md`
+```md
+Changes in ${nextVersion}
+=================
+Released: Not yet
+...
+```