[FEAT]Allow changing git notes (#4753)

Git has a cool feature called git notes. It allows adding a text to a commit without changing the commit itself. Forgejo already displays git notes. With this PR you can also now change git notes.

<details>
<summary>Screenshots</summary>

![grafik](/attachments/53a9546b-c4db-4b07-92ae-eb15b209b21d)
![grafik](/attachments/1bd96f2c-6178-45d2-93d7-d19c7cbe5898)
![grafik](/attachments/9ea73623-25d1-4628-a43f-f5ecbd431788)
![grafik](/attachments/efea0c9e-43c6-4441-bb7e-948177bf9021)

</details>

## Checklist

The [developer guide](https://forgejo.org/docs/next/developer/) contains information that will be helpful to first time contributors. There also are a few [conditions for merging Pull Requests in Forgejo repositories](https://codeberg.org/forgejo/governance/src/branch/main/PullRequestsAgreement.md). You are also welcome to join the [Forgejo development chatroom](https://matrix.to/#/#forgejo-development:matrix.org).

### Tests

- I added test coverage for Go changes...
  - [ ] in their respective `*_test.go` for unit tests.
  - [x] in the `tests/integration` directory if it involves interactions with a live Forgejo server.
- I added test coverage for JavaScript changes...
  - [ ] in `web_src/js/*.test.js` if it can be unit tested.
  - [ ] in `tests/e2e/*.test.e2e.js` if it requires interactions with a live Forgejo server (see also the [developer guide for JavaScript testing](https://codeberg.org/forgejo/forgejo/src/branch/forgejo/tests/e2e/README.md#end-to-end-tests)).

### Documentation

- [ ] I created a pull request [to the documentation](https://codeberg.org/forgejo/docs) to explain to Forgejo users how to use this change.
- [x] I did not document these changes and I do not expect someone else to do it.

### Release notes

- [ ] I do not want this change to show in the release notes.
- [x] I want the title to show in the release notes with a link to this pull request.
- [ ] I want the content of the `release-notes/<pull request number>.md` to be be used for the release notes instead of the title.

<!--start release-notes-assistant-->

## Release notes
<!--URL:https://codeberg.org/forgejo/forgejo-->
- Features
  - [PR](https://codeberg.org/forgejo/forgejo/pulls/4753): <!--number 4753 --><!--line 0 --><!--description QWxsb3cgY2hhbmdpbmcgZ2l0IG5vdGVz-->Allow changing git notes<!--description-->
<!--end release-notes-assistant-->

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/4753
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: JakobDev <jakobdev@gmx.de>
Co-committed-by: JakobDev <jakobdev@gmx.de>

routers/web/repo/commit.go

@@ -27,7 +27,9 @@ import (
 	"code.gitea.io/gitea/modules/markup"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/util"
+	"code.gitea.io/gitea/modules/web"
 	"code.gitea.io/gitea/services/context"
+	"code.gitea.io/gitea/services/forms"
 	"code.gitea.io/gitea/services/gitdiff"
 	git_service "code.gitea.io/gitea/services/repository"
 )
@@ -467,3 +469,29 @@ func processGitCommits(ctx *context.Context, gitCommits []*git.Commit) []*git_mo
 	}
 	return commits
 }
+
+func SetCommitNotes(ctx *context.Context) {
+	form := web.GetForm(ctx).(*forms.CommitNotesForm)
+
+	commitID := ctx.Params(":sha")
+
+	err := git.SetNote(ctx, ctx.Repo.GitRepo, commitID, form.Notes, ctx.Doer.Name, ctx.Doer.GetEmail())
+	if err != nil {
+		ctx.ServerError("SetNote", err)
+		return
+	}
+
+	ctx.Redirect(fmt.Sprintf("%s/commit/%s", ctx.Repo.Repository.HTMLURL(), commitID))
+}
+
+func RemoveCommitNotes(ctx *context.Context) {
+	commitID := ctx.Params(":sha")
+
+	err := git.RemoveNote(ctx, ctx.Repo.GitRepo, commitID)
+	if err != nil {
+		ctx.ServerError("RemoveNotes", err)
+		return
+	}
+
+	ctx.Redirect(fmt.Sprintf("%s/commit/%s", ctx.Repo.Repository.HTMLURL(), commitID))
+}