[FEATURE] Allow opening terminal without automatically entering insert mode

## Feature Description
I would like an option where when I move my cursor to the terminal, it doesn't automatically enters terminal mode but stays in normal mode

## Use Case

I move around a lot and it always trips me up when my navigation buttons do not work anymor because they are trapped by the terminal in neovim.

## Proposed Solution

I tried passing these options, I have also set for the snacks terminal, where they work as expected.
It would nice if it would respect those options by default if they are configured in snacks terminal or pass them like this.

```lua
---@type LazySpec
return {
"coder/claudecode.nvim",
dependencies = { "folke/snacks.nvim" },
opts = {
terminal = {
provider = "snacks",
snacks_win_opts = {
start_insert = true,
auto_insert = false,
auto_close = true,
},
},
},
keys = {
{ "ac", "ClaudeCode", desc = "Toggle Claude Code" },
{ "as", "ClaudeCodeSend", mode = "v", desc = "Send to Claude Code" },
{ "ast", "ClaudeCodeStatus", desc = "Claude Code Status" },
},
}
```

Commencez par retracer la manière dont le fournisseur de terminal gère le focus et le comportement du mode insertion, puis comparez les valeurs demandées de terminal.snacks_win_opts avec l’intégration existante de snacks. Le travail est terminé lorsque l’ouverture ou la mise au focus du terminal peut rester en mode normal tout en respectant les options de terminal configurées.

Rédigé par le modèle d'indexation à partir du texte de l'issue.