[docs][esql] Link to FORK from FUSE docs, and link to ESQL search overview (#137474)

Author: leemthompo

docs/reference/query-languages/esql/_snippets/commands/layout/fork.md

@@ -17,6 +17,8 @@ FORK ( <processing_commands> ) ( <processing_commands> ) ... ( <processing_comma
 The `FORK` processing command creates multiple execution branches to operate
 on the same input data and combines the results in a single output table. A discriminator column (`_fork`) is added to identify which branch each row came from.
 
+Together with the [`FUSE`](/reference/query-languages/esql/commands/fuse.md) command, `FORK` enables hybrid search to combine and score results from multiple queries. To learn more about using {{esql}} for search, refer to [ES|QL for search](docs-content://solutions/search/esql-for-search.md).
+
 **Branch identification:**
 - The `_fork` column identifies each branch with values like `fork1`, `fork2`, `fork3`
 - Values correspond to the order branches are defined