Enhancement: Improve Search Score Algorithm for Program Plugin

### Checks

- [x] I have checked that this issue has not already been reported.

- [x] I am using the latest version of Flow Launcher.

### Problem Description

When using the *program* plugin to start a program, I encounter an issue where my search string is not found as I would expect it. Given a shortcut to a program named `metis Client Prod (cprod)`, I cannot select it by typing `cprod`, as I would expect, but only if I type `(cprod`.


### To Reproduce

1. Create a shortcut to a program in a location that is indexed by Flow Launcher and name it `metis Client Prod (cprod)`.
2. Try to launch the shortcut by typing `cprod`.

### Screenshots

_No response_

### Flow Launcher Version

1.19.5

### Windows Build Number

10.0.26100.3476

### Error Log

Not relevant; no error reported by Flow Launcher