Segregate the CLI, Router, Kernel Logic

[barelyhuman]

• Move the compilation logic out of the CLI (Already done in https://github.com/barelyhuman/dveep/blob/main/packages/dveep/src/lib/builder.js). Uses rollup instead of esbuild so needs the required modifications for the same

• Move the routing logic out of the kernel and the cli and instead it's own tiny module.

  • Scan the directory and generate module imports for every route and file
  • Construct the routes using a manifest or define a routing config
  • Explain the behavior for the routes.js file and the pagination based route in docs