refactor(storybook): consolidate dropdown stories into composed controls

packages/sw/tests/storybook-inventory.mjs

@@ -0,0 +1,6 @@
+// Current SW inventory after the approved stage-1 and Dropdown consolidations.
+export const retiredStage1Ids = ['responsive', 'text-stroke', 'dynamic-data', 'default', 'controls'].map(id => `sw-header--${id}`)
+export const retiredDropdownIds = ['layer-dropdown', 'color-dropdown', 'line-style-dropdown', 'text-dimension-style-dropdown'].map(id => `sw-header--${id}`)
+export const swStoryEntries = index => Object.values(index.entries).filter(entry => entry.type === 'story' && (entry.title === 'SW/Header' || entry.title === 'SW/Header/Dropdown'))
+export const retainedInventory = entries => entries.filter(entry => ![...retiredStage1Ids, ...retiredDropdownIds].includes(entry.id))
+export const inventorySignature = entries => entries.map(entry => [entry.id, entry.name, entry.tags]).sort((a, b) => a[0].localeCompare(b[0]))