feat: add tuono.config.ts support

[Valerioageno]

Context & Description

This PR is the first iteration for creating the main configuration file tuono.config.ts.

We are creating the binding for adding the alias option to the vite configuration.
Enable the ability to resolve #114.

How does it work?

Original implementation

When the `tuono.config.ts` file exists, we build it into a commonjs module inside the `.tuono/config/config.js` file. Then any vite script before starting read the file and apply the changes.

I decided to create the folder .tuono/config/ because when we will have to share the config with rust we will need to strip out all the ineligible values for the V8 engine so we will need to create a sibling config-server.js file (built again with vite and maybe a proper plugin).

Since the file is in the ./tuono/config folder using __dirname will cause issues with the path resolution so, in order to overcome this, I created a path module that has the path.join() function that automatically strips out the wrong filepath and correct __dirname with the tuono folder

New proposed approach can be found in the comment below

[Valerioageno]

Decision after brain-melting:

tuono.config.ts bundling

• Change output extension to mjs (ESM FTW !✨)
• No additional processing (no transform plugin).

Alias processing (for now) after load config

Aliases will be processed from tuono npm package using the following routines:

• If the path is relative turn them into an absolute path from the project root
• If the path is absolute replace .tuono/config/ with /

[marcalexiei]

I applied all the changes we discussed to day and added relevant unit tests.
Let me know if everything checks out also on your end.