Another search speed up 💨

[tom-ludwig]

In this PR, I've enhanced the search process by implementing regular expressions. Rather than manually scanning through each line, regX is now employed, significantly boosting the speed and efficiency of locating search results.

Speed ​​comparison(2.0 means this pr):

Search Term	Searched Project	CE(2.0)	CE(main)	AE	Lines of Code	Characters
'struct'	CE	0.0139	0.0412	0.1437	29,872	31,012,654
'class'	Flutter-App	0.022	0.602	0.783	141,014	180,400,751

*speed in seconds. The Flutter app contains a build folder with a manifest.json file that only consists of one large line and a main.dart.js file that contains long and many lines

Checklist

• I read and understood the contributing guide as well as the code of conduct
• The issues this PR addresses are related to each other
• My changes generate no new warnings
• My code builds and runs on my machine
• My changes are all related to the related issue above
• I documented my code
• Fix search preview
• Refactor evaluateFile function: Split the evaluateFile function into smaller, focused functions, each adhering to the single responsibility principle

Screenshots

[austincondiff]

Do we know why tests are failing?

xcodebuild: error: Could not resolve package dependencies:
  Dependencies could not be resolved because no versions of 'codeedittextview' match the requirement 0.6.[8](https://github.com/CodeEditApp/CodeEdit/actions/runs/7186953012/job/19662455879?pr=1500#step:4:9) and root depends on 'codeedittextview' 0.6.8.

We just merged @thecoolwinter's new text view, but it should be there.

[tom-ludwig]

Do we know why tests are failing?

xcodebuild: error: Could not resolve package dependencies:
  Dependencies could not be resolved because no versions of 'codeedittextview' match the requirement 0.6.[8](https://github.com/CodeEditApp/CodeEdit/actions/runs/7186953012/job/19662455879?pr=1500#step:4:9) and root depends on 'codeedittextview' 0.6.8.

We just merged @thecoolwinter's new text view, but it should be there.

It seems like I couldn't locate 'codeeditortextview' version 0.6.8; instead, I found version 0.7.0. However, 'codeeditsourceeditor' did have a release for version 0.6.8. Could there be a mix-up between the two?