Miscellaneous cleanup

[throwaway96]

• Removed .prettierrc. Settings were mostly moved to .editorconfig, but one ended up in eslint.config.mjs. Prettier still takes them into account.
• Tweaked some ESLint and EditorConfig settings. The JS settings in .editorconfig now cover TS files and additional JS extensions.
• Removed a few unnecessary ESLint disable comments. I used reportUnusedDisableDirectives, but I mostly left anything that would be relevant if the associated rule were enabled. The ones I removed were along the lines of no-unused-vars on a line with no variables.
• Modified a type to eliminate a suppressed TypeScript error in adapter.ts.
• Fixed a handful of spelling mistakes.
• Replaced tabs being used for indentation with spaces. The entire repo is now consistently indented with spaces. I also removed extraneous whitespace at the end of a few lines.

I don't think any of this will really affect the code that ends up in the IPK.

[throwaway96]

ty do you have code to replace my code and take away users made it?

Stop. You didn't respond in RootMyTV/RootMyTV.github.io#141 with any evidence or even basic information about your TV, so nobody is inclined to take you seriously. Spamming our other repos is not going to help with that. The opposite, in fact.

[kitsuned]

lgtm