feat(plugin): add setup to rspack plugin

[noghartt]

• I have read the contribution documentation for this project.
• I agree to follow the code of conduct that this project follows, as appropriate.
• The changes are appropriately documented (if applicable).
• The changes have sufficient test coverage (if applicable).
• The testsuite passes successfully on my local machine (if applicable).

Summarize your changes:

The idea of this PR is to bring a new plugin allowing us to use the rspack as a possible bundler for Electron with forge tooling. By the fact that rspack has a similar API related for Webpack, it follows the same approach. As the example below:

    {
      name: '@electron-forge/plugin-rspack',
      config: {
        mainConfig: './rspack.main.config.js',
        renderer: {
          config: './rspack.renderer.config.js',
          entryPoints: [{
            name: 'main_window',
            html: './src/renderer/index.html',
            js: './src/renderer/index.js',
            preload: {
              js: './src/preload.js'
            }
          }]
        }
      }
    }

[BlackHole1]

Hi @noghartt. CI failed, can you fix it?

[noghartt]

Hi @noghartt. CI failed, can you fix it?

ofc, i'll need to write more tests for these cases and fix the ci

it seems that the types aren't well matched yet

[MarshallOfSound]

It looks like a log of this code is duplicated, I wonder if there is a way we can write this plugin so it uses the webpack plugin impl but swaps out the underlying webpack calls for rspack to avoid massive duplication