feat(camera-test): migrate to test-lib (manifest.lib + run_tests) (Test-Opt Phase 3.3)

Per ADR-0037 Tests-as-Libs Convention. Renamed on Gitea + moved
locally. History preserved.

init.lua

@@ -5,7 +5,9 @@
 local camera = require("lib-core.camera")
 local T      = engine.test
 
-function init(ctx)
+local M = {}
+
+function M.run_tests(ctx)
     -- State setters/getters (3)
     camera.set_target(100, 200)
     local t = camera.target()
@@ -62,3 +64,5 @@ function init(ctx)
     -- Hygiene: reset bounds for any subsequent loads (init-only-lifecycle but defensive)
     camera.clear_bounds()
 end
+
+return M

manifest.lib

@@ -0,0 +1,10 @@
+{
+    "id": "lib-core.camera-test",
+    "role": "test",
+    "version": "0.1.0",
+    "api_min": "0.1",
+    "deps": [
+        {"id": "lib-core.camera", "version": "0.3.0"},
+        {"id": "lib-core.input", "version": "0.4.0"}
+    ]
+}

manifest.module

@@ -1,11 +0,0 @@
-{
-  "id": "lib-core.camera-test",
-  "version": "0.1.0",
-  "kind": "test-module",
-  "api": "^0.1",
-  "entry_point": "init.lua",
-  "deps": [
-    { "id": "lib-core.camera", "version": "0.3.0" },
-    { "id": "lib-core.input",  "version": "0.4.0" }
-  ]
-}