Fix: Ensure consistent character encoding in HTTP response handling

[arif-banai]

Summary

This PR ensures that calls to EntityUtils.toString specify UTF_8 character encoding. This resolves issues with mojibake when system default character encoding is NOT UTF_8.

Commit Message

Updated EntityUtils.toString calls to specify StandardCharsets.UTF_8 for consistent character encoding across multiple classes, including CipherManager, Web, and NonMusicClient.

Added .cursor to .gitignore to exclude cursor files from version control.

[devoxin]

Have you personally run into any issues from the charset not being explicitly defined, or is this just AI junk?

[sqikerz]

AI slop

ref: #197 (comment)

[arif-banai]

I have personally run into this issue.

I incorporated the changes into my application and it fixed my issue when I was playing music from youtube with cyrillic characters

https://github.com/arif-banai/MusicBot/blob/53edb8efcd7c18b002667f2ba35a9ca569b90535/pom.xml#L276-L286

        <dependency>
            <groupId>com.github.arif-banai</groupId>
            <artifactId>youtube-source</artifactId>
            <version>release~debug-and-mojibake-SNAPSHOT</version>
        </dependency>

I was previously fixing this on the application level (in MusicBot) but this felt wrong. Fixing this upstream so applications don't have to deal with this is preferable.

I can try to provide before and after pictures if that would help convince you.

[arif-banai]

@sqikerz I am not sure why you are being so hostile