test(#10336): add components/MkC.* stories (#13830)

* test(storybook): add `components/MkC.*` stories

* test(storybook): add some tests

* test: add sleep

* test: comment-out flaky test

* test(storybook): add test for `MkChannelFollowButton`

* chore(storybook): tweak sleep duration in `MkChannelFollowButton` story test

* fix(chromatic): add delay to `MkChannelList`

* chore: replace `mswDecorator` with `mswLoader`

* fix(storybook): tweak some parameters

* chore: serve static files

* fix(chromatic): add delay to `MkCwButton`

* chore: delete logging for debug

* fix: add right click in `MkContextMenu` play

* refactor: remove unused imports

packages/frontend/.storybook/main.ts

@@ -15,6 +15,7 @@ const _dirname = fileURLToPath(new URL('.', import.meta.url));
 
 const config = {
 	stories: ['../src/**/*.mdx', '../src/**/*.stories.@(js|jsx|ts|tsx)'],
+	staticDirs: [{ from: '../assets', to: '/client-assets' }],
 	addons: [
 		getAbsolutePath('@storybook/addon-essentials'),
 		getAbsolutePath('@storybook/addon-interactions'),