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.

README.md

@@ -47,8 +47,8 @@ extra `coder_script` needed, matching how the `/etc/skel` copy in every
 template's `startup_script` already relies on that same mechanism.
 
 Each `templates/<env>/` is a complete, independent Coder template (agent,
-docker container, code-server, JetBrains) with its own copy of everything
-`main.tf` needs. They're deliberately not built from a shared Terraform
+docker container, code-server) with its own copy of everything `main.tf`
+needs. They're deliberately not built from a shared Terraform
 module or shared files elsewhere in the repo: `coder templates push -d
 templates/<env>` only uploads that one directory to the Coder server, so any
 `file()` reference reaching outside it (e.g. the old shared
@@ -114,6 +114,8 @@ finishes it - and offers to install + log into:
 - **GitHub Copilot CLI** (`bun install -g @github/copilot`, then `copilot login`)
 - **Google Antigravity CLI** (`curl -fsSL https://antigravity.google/cli/install.sh | bash`, binary `agy`)
 - **Claude Code CLI** (`bun install -g @anthropic-ai/claude-code`, then `claude`)
+- **GitHub CLI** (`gh`, via the official apt repo, then `gh auth login`)
+- **Gitea CLI** (`tea`, official binary release downloaded to `~/.local/bin`, then `tea login add`)
 
 It does **not** ask about VS Code extensions, since those are handled by
 Terraform (see above). Once the user confirms completion it writes a