Add file commit history (#588)

- Allow to specify to only get commit history of specific file.
- Ref: https://github.com/go-gitea/gitea/pull/17652

Reviewed-on: https://gitea.com/gitea/go-sdk/pulls/588
Reviewed-by: John Olheiser <john.olheiser@gmail.com>
Reviewed-by: 6543 <6543@obermui.de>
Co-authored-by: Gusted <williamzijl7@hotmail.com>
Co-committed-by: Gusted <williamzijl7@hotmail.com>

gitea/repo_commit.go

@@ -85,14 +85,19 @@ type ListCommitOptions struct {
 	ListOptions
 	// SHA or branch to start listing commits from (usually 'master')
 	SHA string
+	// Path indicates that only commits that include the path's file/dir should be returned.
+	Path string
 }
 
 // QueryEncode turns options into querystring argument
 func (opt *ListCommitOptions) QueryEncode() string {
-	query := opt.ListOptions.getURLQuery()
+	query := opt.getURLQuery()
 	if opt.SHA != "" {
 		query.Add("sha", opt.SHA)
 	}
+	if opt.Path != "" {
+		query.Add("path", opt.Path)
+	}
 	return query.Encode()
 }