[IMPROVEMENT] Need Build Instructions + Better Build Method

### Please confirm these before moving forward.

- [X] I have searched for my feature proposal and have not found a work-in-progress/duplicate/resolved/discarded issue.
- [X] This improvement refers to an existing feature. If you want to suggest a new feature, please use [this template](https://github.com/marticliment/WingetUI/issues/new?assignees=marticliment&labels=new-feature&projects=&template=feature-request.yml&title=%5BFEATURE+REQUEST%5D+%28Enter+your+description+here%29).
- [X] This improvement is not a bug. If you want to report a bug, please use [this template](https://github.com/marticliment/WingetUI/issues/new?assignees=marticliment&labels=bug&projects=&template=bug-issue.yml&title=%5BBUG%5D+%28Enter+your+description+here%29).

### Describe the improvement

There's build_release.bat in the main dir of the repo, but there's no instructions on anything beyond that. There's no information on prerequisite libraries required, no manual compilation steps, nothing. Just a batch file that executes a ton of nested Python code. Having an actual build method in like Clang or something would be way better.

### Describe how this improvement could help users

The current build method executes a bunch of nested Python code. There's no way to tell what that code is doing at a glance. Having a standard build method with detailed instructions ensures that the build can be reproduced, is secure, and can be contributed to in the future (you know, because open source).