Badge for cloud environment (#6048)

This pull request introduces a new system for displaying
environment-specific badges in the application's top bar, with a focus
on supporting a "Comfy Cloud" badge in production environments. The
changes include new badge types, extension support, UI components, and
environment detection logic to ensure badges are only shown in
appropriate contexts.

**Topbar Badge System**

* Added a new `TopbarBadge` type and support for topbar badges in the
`ComfyExtension` interface to allow extensions to specify badges for the
top bar.
[[1]](diffhunk://#diff-c29886a1b0c982c6fff3545af0ca8ec269876c2cf3948f867d08c14032c04d66R24-R31)
[[2]](diffhunk://#diff-c29886a1b0c982c6fff3545af0ca8ec269876c2cf3948f867d08c14032c04d66R85-R88)
* Created a Pinia store `topbarBadgeStore` to aggregate topbar badges
from all registered extensions for display.

**UI Integration**

* Added a new `TopbarBadges.vue` component to render topbar badges and
integrated it into the top menu bar UI.
[[1]](diffhunk://#diff-6f460b1398fd033a2059daca1f991c74ce572cef86046a3726d1b1a70a3a4325R1-R32)
[[2]](diffhunk://#diff-b7d7bf1028f09fb907c09edf27631214d005c93b80eaff7cf15cfd53671b1e8aL5-R14)
* Updated CSS variables and menu styling to support the new badge
visuals.
[[1]](diffhunk://#diff-71b6b57a56095b04e47c797a5016149b76b27971cab04b93f033f1f846e0f5a0R88-R89)
[[2]](diffhunk://#diff-b7d7bf1028f09fb907c09edf27631214d005c93b80eaff7cf15cfd53671b1e8aL5-R14)

**Environment Detection and Extension Registration**

* Added a runtime environment detection utility to determine if the app
is running in production or staging, replacing the previous build-time
constant approach.
* Registered a new `cloudBadge` extension that conditionally adds a
"Comfy Cloud" badge with a "BETA" label when running in production.
[[1]](diffhunk://#diff-b7818ca9daae2411d56695777160b8132507f2a3ff4f700d2510453c8833ca75R1-R15)
[[2]](diffhunk://#diff-236993d9e4213efe96d267c75c3292d32b93aa4dd6c3318d26a397e0ae56bc87R2)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6048-Badge-for-cloud-environment-28c6d73d365081188050ece527c3c8f3)
by [Unito](https://www.unito.io)

<img width="996" height="897" alt="Screenshot 2025-10-14 at 20 02 40"
src="https://github.com/user-attachments/assets/5a3258c5-87fc-46ae-ad23-7669696cb8b6"
/>

packages/design-system/src/css/style.css

@@ -88,6 +88,10 @@
   --color-bypass: #6a246a;
   --color-error: #962a2a;
 
+  --color-comfy-menu-secondary: var(--comfy-menu-secondary-bg);
+  --text-xxxs: 0.5625rem;
+  --text-xxxs--line-height: calc(1 / 0.5625);
+
   --color-blue-selection: rgb(from var(--color-blue-100) r g b / 0.3);
   --color-node-hover-100: rgb(from var(--color-charcoal-100) r g b/ 0.15);
   --color-node-hover-200: rgb(from var(--color-charcoal-100) r g b/ 0.1);