Remove unsupported Wrangler config options and in some cases warn when they are used

[jamesopstad]

The following user defined Wrangler config fields are not applicable when using the Vite plugin:

alias, base_dir, build, define, dev, find_additional_modules, minify, no_bundle, node_compat (old), preserve_file_names, rules, site, tsconfig, upload_source_maps

Some are replaced by Vite functionality (e.g. alias, define etc.), some are not relevant (e.g. node_compat) and some are added to the config by the plugin at build time (e.g. no_bundle, rules).

We should define and implement the correct behaviour in each case.

[jamesopstad]

Resolved in #112.