chore(refactor): remove shared folder dependencies to the server

Many files from the `shared` folder were importing files from the `server` folder.
When attempting to use Typescript project references to describe dependencies,
it highlighted a circular dependency beetween `shared` <-> `server`.

The Typescript project forbid such usages.
Using project references greatly improve performance by rebuilding only
the updated project and not all source files.
> see https://www.typescriptlang.org/docs/handbook/project-references.html

shared/core-utils/path.ts

@@ -0,0 +1,34 @@
+import { basename, extname, isAbsolute, join, resolve } from 'path'
+
+let rootPath: string
+
+function root () {
+  if (rootPath) return rootPath
+
+  rootPath = __dirname
+
+  if (basename(rootPath) === 'core-utils') rootPath = resolve(rootPath, '..')
+  if (basename(rootPath) === 'shared') rootPath = resolve(rootPath, '..')
+  if (basename(rootPath) === 'server') rootPath = resolve(rootPath, '..')
+  if (basename(rootPath) === 'dist') rootPath = resolve(rootPath, '..')
+
+  return rootPath
+}
+
+function buildPath (path: string) {
+  if (isAbsolute(path)) return path
+
+  return join(root(), path)
+}
+
+function getLowercaseExtension (filename: string) {
+  const ext = extname(filename) || ''
+
+  return ext.toLowerCase()
+}
+
+export {
+  root,
+  buildPath,
+  getLowercaseExtension
+}