Provide a detailed guide on how to enable and customize nim.inlayHints.

[GabrielJeffR]

Description:

The current documentation does not clearly explain how to enable or customize nim.inlayHints in Nim’s language server.
Users may find it difficult to understand which options are available or where to define them (e.g., in VS Code settings, coc-settings.json, or Neovim LSP configuration).

This improvement should include:

• A clear explanation of what inlay hints are and how they enhance code readability.

• Example configurations for popular editors (VS Code, Neovim, etc.).

• A list of available inlayHints options, such as:

  • typeHints.enable
  • parameterHints.enable
  • exceptionHints.enable
  • Information on how to toggle them and what each hint type displays.

Updating the README or wiki with these details would make it easier for developers to take full advantage of this feature and improve their overall development experience with Nim.

[moigagoo]

Instructions added in this PR: #369