chore: update deps, adapt lint, use json v2 (#1185)

- Raised go to 1.27
- Adopted json v2
- Sync lint config from gitea
- Fixed all issues

Co-authored-by: silverwind <me@silverwind.io>
Reviewed-on: https://gitea.com/gitea/runner/pulls/1185
Reviewed-by: bircni <bircni@icloud.com>
Co-authored-by: Renovate Bot <renovate-bot@gitea.com>

act/common/line_writer.go

@@ -46,14 +46,14 @@ func (lw *lineWriter) Write(p []byte) (n int, err error) {
 		line, err := pBuf.ReadString('\n')
 		w, _ := lw.buffer.WriteString(line)
 		written += w
-		if err == nil {
-			lw.handleLine(lw.buffer.String())
-			lw.buffer.Reset()
-		} else if err == io.EOF {
-			break
-		} else {
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
 			return written, err
 		}
+		lw.handleLine(lw.buffer.String())
+		lw.buffer.Reset()
 	}
 
 	return written, nil