chore(projects): add enso conf.json and document symlink removal

Initial state: projects/enso was a broken symlink to ../../projects/enso.

Motivation: register Enso monorepo in ia_dev like lecoffreio for shared deploy orchestrator.

Resolution: add projects/enso/conf.json (repository_root, deploy paths, secrets_path under .secrets/enso); extend projects/README.md with enso note and symlink warning.

Root cause: obsolete symlink outside repo layout.

Impacted: ia_dev project registry only; no runtime code.

projects/README.md

@@ -3,3 +3,10 @@
 Documentation canonique dans **smart_ide** :
 
 **[docs/repo/ia-dev-project-conf-schema.md](../../docs/repo/ia-dev-project-conf-schema.md)**
+
+## Projects (examples)
+
+- **lecoffreio** — directory `projects/lecoffreio/` (see `conf.json` + optional `.secrets/`).
+- **enso** — `projects/enso/conf.json` registers the Enso monorepo (`deploy.repository_root`) and `deploy.secrets_path` → `$IA_DEV_ROOT/.secrets/enso` (per-env `enso-deploy.env` under `test` / `pprod` / `prod`).
+
+**Note (enso):** the previous broken symlink `projects/enso` → `../../projects/enso` was removed. Use this versioned directory only; do not recreate that relative symlink.

projects/enso

@@ -1 +0,0 @@
-../../projects/enso

projects/enso/conf.json

@@ -0,0 +1,16 @@
+{
+	"id": "enso",
+	"name": "Enso",
+	"project_path": "/home/desk/enso/deploy",
+	"deploy": {
+		"repository_root": "/home/desk/enso",
+		"scripts_path": "/home/desk/enso/deploy/scripts_v2",
+		"deploy_script_path": "/home/desk/enso/deploy/scripts_v2/deploy.sh",
+		"project_orchestrator_path": "deploy/scripts_v2/deploy.sh",
+		"secrets_path": "/home/desk/code/ia_dev/.secrets/enso"
+	},
+	"version": {
+		"package_json_paths": ["/home/desk/enso/package.json"],
+		"splash_app_name": "Enso"
+	}
+}