build: playground examples do not explicitly specify "ng_module" assets (#28562)

Currently all playground examples are built with NGC, and most
of the HTML resources are automatically inlined. Surprisingly NGC
is able to resolve the relative component assets even though these
aren't specified in the `assets`. This seems to work because NGC
resolves the files in the execroot where the files are present
(if Bazel doesn't use sandboxing).

Issue is tracked with TOOL-667

PR Close #28562

modules/playground/src/gestures/BUILD.bazel

@@ -6,6 +6,7 @@ package(default_visibility = ["//modules/playground:__subpackages__"])
 ng_module(
     name = "gestures",
     srcs = glob(["**/*.ts"]),
+    assets = ["template.html"],
     tsconfig = "//modules/playground:tsconfig-build.json",
     # TODO: FW-1004 Type checking is currently not complete.
     type_check = False,

modules/playground/src/todo/BUILD.bazel

@@ -6,6 +6,7 @@ package(default_visibility = ["//modules/playground:__subpackages__"])
 ng_module(
     name = "todo",
     srcs = glob(["**/*.ts"]),
+    assets = ["todo.html"],
     tsconfig = "//modules/playground:tsconfig-build.json",
     # TODO: FW-1004 Type checking is currently not complete.
     type_check = False,

modules/playground/src/web_workers/images/BUILD.bazel

@@ -6,6 +6,7 @@ package(default_visibility = ["//modules/playground:__subpackages__"])
 ng_module(
     name = "images",
     srcs = glob(["**/*.ts"]),
+    assets = ["image_demo.html"],
     tsconfig = "//modules/playground:tsconfig-build.json",
     # TODO: FW-1004 Type checking is currently not complete.
     type_check = False,

modules/playground/src/web_workers/router/BUILD.bazel

@@ -6,6 +6,7 @@ package(default_visibility = ["//modules/playground:__subpackages__"])
 ng_module(
     name = "router",
     srcs = glob(["**/*.ts"]),
+    assets = ["app.html"],
     tsconfig = "//modules/playground:tsconfig-build.json",
     # TODO: FW-1004 Type checking is currently not complete.
     type_check = False,

modules/playground/src/web_workers/todo/BUILD.bazel

@@ -6,6 +6,7 @@ package(default_visibility = ["//modules/playground:__subpackages__"])
 ng_module(
     name = "todo",
     srcs = glob(["**/*.ts"]),
+    assets = ["todo.html"],
     tsconfig = "//modules/playground:tsconfig-build.json",
     # TODO: FW-1004 Type checking is currently not complete.
     type_check = False,

modules/playground/src/zippy_component/BUILD.bazel

@@ -6,7 +6,7 @@ package(default_visibility = ["//modules/playground:__subpackages__"])
 ng_module(
     name = "zippy_component",
     srcs = glob(["**/*.ts"]),
-    assets = glob(["**/*.html"]),
+    assets = glob(["app/zippy.html"]),
     tsconfig = "//modules/playground:tsconfig-build.json",
     # TODO: FW-1004 Type checking is currently not complete.
     type_check = False,