feat: Add release automation config

[shiki-tak]

Closes: #107

Description

• Added config to automatically release PRs for release when they are merged into the main branch.

What we can do with this.

1. Automatically create a new version from the branch name.
2. Automatically generate and commit a changelog.
3. Upload dev contracts
4. Publish

Release process

1. make PR to main branch

• The format of the branch name should be release-vx.x.x-x.x.x.
• PR's comment becomes the body of the release notes.

2. On the PR, CI job(changelog.yml) extracts target version from branch name.
3. CI job create new tag from branch name.
4. CI job generates the changelog and appends to CHANGELOG-LINK.md

• using git-chglog

5. Github Actions automatically commit CHANGELOG-LINK.md.
6. PR review.
7. merge -> main
8. On the main, CI job(release.yml) publish artifacts and create release notes.

Proposal

The original repository tag is inconvenient to update our changelog from the release tag.
How about removing the original repository tag from the remote repository?

Motivation and context

How has this been tested?

Checklist:

• I followed the contributing guidelines.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.

[loloicci]

Want document about release process in the repository (not only in PR comment).

[loloicci]

Do you have a github repository in which you tested this workflow? If you have, I want to see it to review.

[shiki-tak]

Do you have a github repository in which you tested this workflow? If you have, I want to see it to review.

Please use the following repositories.
https://github.com/shiki-tak/cosmwasm-1

[loloicci]

https://github.com/shiki-tak/cosmwasm-1/blob/main/CHANGELOG-MY.md

Want not only title of the commit log, but also PR number or commit hash in the changelog.

[whylee259]

👍

[shiki-tak]

@whylee259 @loloicci @brew0722
git-chglog can also automatically add Pull Requests and Revert to CHANGELOG. (I'm not including them in the current template.)
Do you think this is necessary?

[whylee259]

@whylee259 @loloicci @brew0722
git-chglog can also automatically add Pull Requests and Revert to CHANGELOG. (I'm not including them in the current template.)
Do you think this is necessary?

I don't think it is necessary.

[shiki-tak]

https://github.com/shiki-tak/cosmwasm-1/blob/main/CHANGELOG-MY.md

Want not only title of the commit log, but also PR number or commit hash in the changelog.

I added commit hash in changelog.
https://github.com/line/cosmwasm/pull/108/files#diff-89474b0fcc5409cf997158a804c3dbd2e2758b259ac76e7b53b9a201c7c464fcR8

[CLAassistant]

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