feat(coderd/templatebuilder): author initial module catalog for 19 modules (#26194)

> [!NOTE]
> This PR was authored by Coder Agents on behalf of @jeremyruppel.

Runs the `scripts/modulegen` generator against the coder/registry to produce the initial module catalog for the template builder. Generates `module.json` and `.tf.tmpl` files for 19 modules across four categories:

- **IDE**: code-server, jetbrains, vscode-desktop, vscode-web, cursor, windsurf, zed, kiro
- **AI Agent**: claude-code, aider, goose, amazon-q
- **Source Control**: git-clone, git-config, git-commit-signing
- **Utility**: dotfiles, personalize, filebrowser, jupyterlab

Also updates `catalog_test.go` to validate the new embedded modules load correctly.

coderd/templatebuilder/modules/dotfiles/dotfiles.tf.tmpl

@@ -0,0 +1,14 @@
+module "dotfiles" {
+  count    = data.coder_workspace.me.start_count
+  source   = "{{ .RegistryBase }}/coder/dotfiles/coder"
+  version  = "{{ .PinnedVersion }}"
+  agent_id = coder_agent.{{ .AgentResourceName }}.id
+  default_dotfiles_branch = {{ .Variables.default_dotfiles_branch }}
+  default_dotfiles_uri = {{ .Variables.default_dotfiles_uri }}
+  description = {{ .Variables.description }}
+  dotfiles_branch = {{ .Variables.dotfiles_branch }}
+  dotfiles_uri = {{ .Variables.dotfiles_uri }}
+  manual_update = {{ .Variables.manual_update }}
+  post_clone_script = {{ .Variables.post_clone_script }}
+  user = {{ .Variables.user }}
+}