docs: add release process (#420)

Co-authored-by: Marcos Sevilla <31174242+marcossevilla@users.noreply.github.com>

Author: matiasleyba

CONTRIBUTING.md

@@ -0,0 +1,71 @@
+## 🦦 Releasing
+
+1. Go to the **main** branch and ensure it is up to date with the remote:
+
+```bash
+git checkout main
+git pull
+```
+
+2. Run the script that will generate the CHANGELOG for you: 
+
+```bash
+sh tool/release_ready.sh <new-version>
+```
+
+**Note 💡** : You should follow semantic versioning and bump according to the changes the new version makes.
+
+`<new-version>`: The version of this new extension release, for example: 0.2.1
+
+The release_ready script will:
+
+ - Create a new branch just for this release and checkout to it.
+ - Automatically update the CHANGELOG file with the associated changes.
+
+3. Manually remove the *(deps-dev)* scope or other entries of the conventional commits entries in the CHANGELOG
+4. Add the changes and commit with the commit message that the *release_ready* script outputted.
+5. Raise a Pull Request, the title should be the same as the commit message outputted by the *release_ready* script.
+6. When the Pull Request is merged, tag a new release to the commit. When adding the tag ensure:
+    - The tag is pointing to the commit that you recently merged.
+    - The title of the tag should be v<new-version>
+    - The title of the release should be v<new-version>
+    - The description should be a raw copy of the CHANGELOG’s file version’s body you recently crafted (without the version header). If in doubt, see the other released tags as an example.
+7. After the release is tagged the new changes will be available by the the following syntax:
+
+```yaml
+VeryGoodOpenSource/..@v<new-version>
+```
+
+Where: 
+
+- `<new-version>`: The version of this new workflow or action, for example: 0.2.1
+8. Go to the **main** branch and ensure it is up to date with the remote:
+
+```yaml
+git checkout main
+git pull
+```
+
+9. Retag the major release.
+
+For the Workflow or Action to be updated for those users using the `@<major-version` syntax we will require to retag the major release.
+
+```yaml
+sh tool/retag_v<major-version>.sh <new-version>
+```
+
+Where: 
+
+- `<major-version>`: Is the major version of the release, for example in 2.16.3 the major version is 2. For more information see the [semantic versioning documentation](https://semver.org/).
+- `<new-version>`: The version of this new workflow or action, for example: 0.2.1.
+
+
+If your change is a breaking change and requires a new major release you should update the name of the retag script and its `v<major-version>` instances.
+
+10. After the retag the new changes will be available by the the following syntax:
+
+```yaml
+VeryGoodOpenSource/..@v<major-version>
+```
+
+Where: `<major-version>`: Is the major version of the release, for example in 2.16.3 the major version is 2. For more information see the [semantic versioning documentation](https://semver.org/).