[0.5.x] Support customising hot file / build path

[timacdonald]

This PR introduces a new configuration option to specify the location of the hot file. This is really just an escape hatch from our normal conventions.

// vite.config.js

export default defineConfig({
    plugins: [
        laravel({
            hotFile: 'storage/vite.hot',
            // ...
        }),
    ],
});

// *.blade.php

{{ Vite::useHotFile(storage_path('vite.hot'))->withEntryPoints(['resources/js/app.js']) }}

This PR depends on: laravel/framework#43620

The ability to customise the build directory (as seen in the above linked PR) is already possible without the need for additional changes to the plugin:

// vite.config.js

export default defineConfig({
    plugins: [
        laravel({
            buildDirectory: 'foo/bar',
            // ...
        }),
    ],
});

// *.blade.php

{{ Vite::useBuildDirectory('foo/bar')->withEntryPoints(['resources/js/app.js']) }}

Note that by design the build directory is always relative to the public directory but the hot path is used as is.

[timacdonald]

Documentation PR: laravel/docs#8146