Typescript Clean Build

[Sayeem2004]

This PR basically restructures the project to obtain a clean TS build that compiles even with "strict" TS checking. Even though there are still some "unknown" types that had to be used (because some dependencies like "bit-field" and "onml" didn't have types to import) their use is limited.

The methodology of converting 11ty to TS support is by doing a two step compilation process of (TS -> JS and JS -> 11ty).
A summary of the changes (listed in order of the file changes) is shown below:

• In order to hide JS files from the GitHub, while also having 11ty parse them (because 11ty automatically ignores the files in .gitignore), I had to create a separate .eleventyignore file.
• eleventy.config.js is a lot simpler now because the custom frontend TS logic is just replaced by the tsc compiler. Only things remaining now are some Passthrough Copies.
• Added concurrently to package.json to run tsc and 11ty at the same time, added some more types packages, and had to override minimatch due to a vulnerability that 11ty hasn't fixed yet.
• The files in _data stayed as JS, but they are super simple so its probably fine. All file imports should import the .js version of a file now.
• layout.njk now allows for a list of custom CSS files to be added to a page, and the style.css was split into 4 to allow for better modularization in the future.
• Since we are planning on keeping this site relatively simple, and you can customize URLs through the permalink tag in Nunjucks, I moved all our njk files into the pages folder rather than having a single folder for a single njk file.
• To help reduce the size of individual TS files, I moved all hard coded data into hardcodedData.ts, and types into types.d.ts which doesn't need to be imported which is pretty nice. types.d.ts also declares some modules to help reduce types errors with "bit-field" and "onml" imports.
• loadExtensions.ts, loadInstructions.ts, and search.ts all have enough type definitions to prevent tsc errors when running npm run check (alias to tsc --noEmit), but I did not type everything to reduce code clutter.

[Xhether]

lgtm