Write tutorial about redefining library blocks

It can be a common solution of #302, #369, #962 etc.

Read related issues #302, #369, and #962 to understand the library-block redefinition problem and why a tutorial would address it. Then inspect the repository's existing documentation structure, if present, and define the tutorial's scope around that shared solution. Done means a clear tutorial explaining the approach described by those issues.

Written by the indexing model from the issue text.