feat: support try option for all utils

[8ctavio]

Resolves #257

• Add MaybeTry utility type to resolve return type of functions that accept try.
• Add try support for findFile (required so that functions using findFile may also suppress errors), findNearestFile, and findFarthestFile.
• Add try support for findPackage, readPackage, and updatePackage.
• Add readPackage test for returning undefined instead of throwing error with try: true.

[pi0]

I'm feeling maybe we should call it tryResolve, as calls can throw error if reading (permissions) or parsing (malformed) errors happen.

[8ctavio]

For the functions in resolve/utils.ts there is no problem in renaming to tryResolve. But should the findPackage, readPackage, and updatePackage functions keep their try option (extended from exsolve's ResolveOptions)? When calling utils from those functions, options could be transformed like this: { ...options, tryResolve: options.try }. Other alternative would be to Omit try and replace with tryResolve.