Add gh/tea to the CLI wizard, drop the JetBrains module from all templates

- cli-setup-wizard.sh (identical across all 6 templates): add GitHub CLI
  (gh, installed via the official apt repo) and Gitea CLI (tea, official
  binary release to ~/.local/bin) as two more opt-in install-then-login
  prompts, alongside the existing Copilot/Antigravity/Claude Code CLI
  entries. Same pattern: skip if already installed, ask before installing,
  attempt login, never hard-fail the wizard.
- main.tf (all 6 templates): remove the `module "jetbrains"` block - not
  used, dropped per request.
- README.md: update the "Layout" blurb and CLI setup wizard tool list to
  match.

templates/cobol/main.tf

@@ -141,17 +141,6 @@ module "code-server" {
   order      = 1
 }
 
-# See https://registry.coder.com/modules/coder/jetbrains
-module "jetbrains" {
-  count      = data.coder_workspace.me.start_count
-  source     = "registry.coder.com/coder/jetbrains/coder"
-  version    = "~> 1.1"
-  agent_id   = coder_agent.main.id
-  agent_name = "main"
-  folder     = "/home/coder"
-  tooltip    = "You need to [install JetBrains Toolbox](https://coder.com/docs/user-guides/workspace-access/jetbrains/toolbox) to use this app."
-}
-
 resource "docker_volume" "home_volume" {
   name = "coder-${data.coder_workspace.me.id}-home"
   # Protect the volume from being deleted due to changes in attributes.