provide initialized compilation to custom loader script (and resource plugins)

[thescientist13]

Summary

As observed in ProjectEvergreen/www.greenwoodjs.dev#84, another item of context was missing from the compilation provided to plugins when pre-rendering / SSR'ing and so we had to patch support for userWorkspace to handle bundling images defined in the our theme.css file, otherwise we got this error

TypeError [ERR_INVALID_URL]: Invalid URL
    at new NodeError (node:internal/errors:405:5)
    at new URL (node:internal/url:676:13)
    at Object.enter (file:///Users/owenbuckley/Workspace/project-evergreen/www.greenwoodjs.dev/node_modules/@greenwood/cli/src/plugins/resource/plugin-standard-css.js:54:13)
    at walkNode (file:///Users/owenbuckley/Workspace/project-evergreen/www.greenwoodjs.dev/node_modules/css-tree/lib/walker/create.js:169:36)
    at List.walkReducer (file:///Users/owenbuckley/Workspace/project-evergreen/www.greenwoodjs.dev/node_modules/css-tree/lib/walker/create.js:195:61)
    at List.reduce (file:///Users/owenbuckley/Workspace/project-evergreen/www.greenwoodjs.dev/node_modules/css-tree/lib/utils/List.js:174:22)
    at Object.Value (file:///Users/owenbuckley/Workspace/project-evergreen/www.greenwoodjs.dev/node_modules/css-tree/lib/walker/create.js:103:31)
    at walkNode (file:///Users/owenbuckley/Workspace/project-evergreen/www.greenwoodjs.dev/node_modules/css-tree/lib/walker/create.js:180:41)
    at Object.Declaration (file:///Users/owenbuckley/Workspace/project-evergreen/www.greenwoodjs.dev/node_modules/css-tree/lib/walker/create.js:108:28)
    at walkNode (file:///Users/owenbuckley/Workspace/project-evergreen/www.greenwoodjs.dev/node_modules/css-tree/lib/walker/create.js:180:41) {
  input: './assets/link.svg',
  code: 'ERR_INVALID_URL'
}

Further more, the src/ directory had to be hardcoded,

Details

This is not that surprising, as we only provide certain values currently, and are hardcoding them ourselves, so we should probably change that :D

const config = await initConfig();
const resourcePlugins = config.plugins
  .filter(plugin => plugin.type === 'resource')
  .filter(plugin => plugin.name !== 'plugin-node-modules:resource' && plugin.name !== 'plugin-user-workspace')
  .map(plugin => plugin.provider({
    context: {
      outputDir: new URL(`file://${process.cwd()}/public`),
      projectDirectory: new URL(`file://${process.cwd()}/`),
      scratchDir: new URL(`file://${process.cwd()}/.greenwood/`)
    },
    config: {
      devServer: {}
    },
    graph: []
  }));

---

Based on some initial testing, we should at least be able to full support config and context, since i don't think the graph will be relevant in the context of loading custom JavaScript formats.

const config = await readAndMergeConfig();
const context = await initContext({ config });

const resourcePlugins = config.plugins
  .filter(plugin => plugin.type === 'resource')
  .filter(plugin => plugin.name !== 'plugin-node-modules:resource' && plugin.name !== 'plugin-user-workspace')
  .map(plugin => plugin.provider({
    context,
    config,
    graph: []
  }));