Allow configuring custom capabilities (e.g. to disable snippets in completions)

[bew]

Feature description

Hello !
I'm considering using this plugin, but looking at how capabilities are defined it looks like there are no way to pass custom capabilities..

In my previous config I used:

    capabilities = vim.tbl_deep_extend(
      "force",
      vim.lsp.protocol.make_client_capabilities(),
      require"cmp_nvim_lsp".default_capabilities(),
      {
        -- Disable snippets in completion candidates
        textDocument = { completion = { completionItem = { snippetSupport = false } } }
      }
    ),

I know this plugin automatically loads default caps + cmp_nvim_lsp's, but I don't think there's a way to force pass the last section to disable snippets in completions 🤔

[mrcjkb]

Hey 👋

Here's an example snippet:

vim.g.rustaceanvim = {
  server = {
    capabilities = {
      textDocument = {
        completion = {
          completionItem = {
            snippetSupport = false,
          },
        }
      },
    },
  },
}

See also :h rustaceanvim.config.