Refactor: Centralize Uri Creation with UriBuilder Pattern

[marcarro]

Description

As mentioned in #10578 (comment): throughout the Razor codebase, there's a recurring pattern of using UriBuilder to construct file-schema URIs. It would be useful to create a global helper method for URI creation and update all instances where the UriBuilder pattern is used with this helper method.

Examples

One common usage pattern observed is:

      var newComponentUri = new UriBuilder
      {
          Scheme = Uri.UriSchemeFile,
          Path = updatedComponentPath,
          Host = string.Empty,
      }.Uri;

Proposal

Implement a global helper method, e.g., CreateFileUri(string path), that encapsulates the UriBuilder pattern.