feat(foundation): add company colors story

Add Foundation > Company Colors as a separate Storybook menu placed right
after Color. It shows the 7 affiliates and 14 colors from the existing
companyColorPresets (main first, then secondary) with the Color chip styles
and the Default emphasis reused for the main color. Theme tokens, public API
and the existing Color story are unchanged.

- Foundation sort order: Color, Company Colors, Typography, Layout
- Company chip width rule scoped to the company rows
- Document the menu in brand-color-steps.md
- Add the new story to the Story Inventory records

.storybook/preview.tsx

@@ -25,7 +25,7 @@ const preview: Preview = {
         includeNames: true,
         order: [
           "Foundation",
-          ["Color", "Typography", "Layout"],
+          ["Color", "Company Colors", "Typography", "Layout"],
           "Components",
           [
             "Form",

.storybook/qa/STORY-INVENTORY.md

@@ -6,16 +6,16 @@ This is a classification record. No Story IDs, exports or titles are renamed. HI
 
 ## Summary
 
-- PRIMARY: 65
+- PRIMARY: 66
 - VERIFICATION: 212
 - UTILITY: 15
 - LEGACY / DUPLICATE: 0
-- KEEP: 65
+- KEEP: 66
 - HIDE: 227
 - MERGE_CANDIDATE: 31
 - DELETE_CANDIDATE: 0
-- Story files: 63
-- Stories: 292
+- Story files: 64
+- Stories: 293
 - Hierarchy: Foundation → Components → Patterns → Center Graphic → Theme
 
 ## Full inventory
@@ -504,6 +504,12 @@ Source: `src/foundation/color.stories.tsx`; meta.tags: []
 
 - All — Color; tags: []; PRIMARY; KEEP. Representative story or distinct reference page.
 
+### Foundation/Company Colors
+
+Source: `src/foundation/company-colors.stories.tsx`; meta.tags: []
+
+- All — Company Colors; tags: []; PRIMARY; KEEP. Representative story or distinct reference page.
+
 ### Foundation/Layout
 
 Source: `src/foundation/layout.stories.tsx`; meta.tags: []

.storybook/qa/story-inventory.json

@@ -1,15 +1,15 @@
 {
   "summary": {
-    "storyFiles": 63,
-    "stories": 292,
+    "storyFiles": 64,
+    "stories": 293,
     "categories": {
-      "PRIMARY": 65,
+      "PRIMARY": 66,
       "VERIFICATION": 212,
       "UTILITY": 15,
       "LEGACY / DUPLICATE": 0
     },
     "decisions": {
-      "KEEP": 65,
+      "KEEP": 66,
       "HIDE": 227,
       "MERGE_CANDIDATE": 31,
       "DELETE_CANDIDATE": 0
@@ -3631,6 +3631,24 @@
         }
       ]
     },
+    {
+      "file": "src/foundation/company-colors.stories.tsx",
+      "title": "Foundation/Company Colors",
+      "metaTags": [],
+      "stories": [
+        {
+          "id": "foundation-company-colors--all",
+          "exportName": "All",
+          "name": "Company Colors",
+          "storyTags": [],
+          "effectiveTags": [],
+          "category": "PRIMARY",
+          "decision": "KEEP",
+          "candidate": null,
+          "reason": "Representative story or distinct reference page."
+        }
+      ]
+    },
     {
       "file": "src/foundation/layout.stories.tsx",
       "title": "Foundation/Layout",