The find in projects feature is a single threaded task, adjustment suggestions

### Description

The find in projects feature is a single threaded task. It is recommended to modify and adjust it to multi-threaded parallel search, as there are multiple conditional searches that can only wait for the completion of the previous search task before proceeding to the next search task

### Use case/motivation

_No response_

### Related issues

_No response_

### Are you willing to submit a pull request?

No

Start by locating the NetBeans “find in projects” feature and tracing its current search task and conditional searches. Define how the searches can run in parallel without changing their results, then verify that the feature no longer waits for each search to finish sequentially.

Written by the indexing model from the issue text.