fix(docsite-v9): make motion docs work

[Hotell]

Previous Behavior

motion stories provided invalid Meta configuration resulting in throwing error when rendering stories

New Behavior

Motion stories render

• motion stories provide valid Meta
• docsite-v9 adds extra primaryStory assertion in order to provide better DX what went wrong
  • 

Related Issue(s)

• Fixes [Bug]: motion docs are broken #32461
• Follows fix(public-docsite-v9): subcomponents prop docs are not visible on docsite #32382

[fabricteam]

📊 Bundle size report

✅ No changes found

[dmytrokirpa]

@Hotell there are few more occurrences of component: null in stories.

diff --git a/packages/react-components/react-portal/stories/src/toMountNodeProps/index.stories.tsx b/packages/react-components/react-portal/stories/src/toMountNodeProps/index.stories.tsx
index 8dfd1360a9..5b3d9c25e3 100644
--- a/packages/react-components/react-portal/stories/src/toMountNodeProps/index.stories.tsx
+++ b/packages/react-components/react-portal/stories/src/toMountNodeProps/index.stories.tsx
@@ -4,7 +4,6 @@ export { Default } from './Default.stories';
 
 export default {
   title: 'Components/Portal/toMountNodeProps',
-  component: null,
   parameters: {
     docs: {
       description: {
diff --git a/packages/react-components/react-shared-contexts/stories/src/UseAnnouce/index.stories.tsx b/packages/react-components/react-shared-contexts/stories/src/UseAnnouce/index.stories.tsx
index 6ee9101fb6..ffcf130699 100644
--- a/packages/react-components/react-shared-contexts/stories/src/UseAnnouce/index.stories.tsx
+++ b/packages/react-components/react-shared-contexts/stories/src/UseAnnouce/index.stories.tsx
@@ -4,7 +4,6 @@ export { Default } from './UseAnnounceDefault.stories';

[Hotell]

@Hotell there are few more occurrences of component: null in stories.

diff --git a/packages/react-components/react-portal/stories/src/toMountNodeProps/index.stories.tsx b/packages/react-components/react-portal/stories/src/toMountNodeProps/index.stories.tsx
index 8dfd1360a9..5b3d9c25e3 100644
--- a/packages/react-components/react-portal/stories/src/toMountNodeProps/index.stories.tsx
+++ b/packages/react-components/react-portal/stories/src/toMountNodeProps/index.stories.tsx
@@ -4,7 +4,6 @@ export { Default } from './Default.stories';
 
 export default {
   title: 'Components/Portal/toMountNodeProps',
-  component: null,
   parameters: {
     docs: {
       description: {
diff --git a/packages/react-components/react-shared-contexts/stories/src/UseAnnouce/index.stories.tsx b/packages/react-components/react-shared-contexts/stories/src/UseAnnouce/index.stories.tsx
index 6ee9101fb6..ffcf130699 100644
--- a/packages/react-components/react-shared-contexts/stories/src/UseAnnouce/index.stories.tsx
+++ b/packages/react-components/react-shared-contexts/stories/src/UseAnnouce/index.stories.tsx
@@ -4,7 +4,6 @@ export { Default } from './UseAnnounceDefault.stories';

nice finding ! ty

discussed offline - we gonna create a separate PR that will address those + migrating these misused .ts files to use .mdx only