Review the list of Blocks documentation

### Problem description
Guardian community needs detailed documentation on Blocks and also reported that some blocks are missing, which are currently in Guardian.

### Requirements
1. Review the current list of blocks in the documentation.
2. List out all the missing blocks, which are already present in Guardian but not in the documentation.
3. Create a detailed block documentation for the missing blocks.
4. Update the gitbook documentation on the missing ones.

### Definition of done
Updated missing blocks documentation and reviewed.

### Acceptance criteria
As mentioned in DOD.