feat: add Ollama Cloud quota provider (#544)

* feat: add Ollama Cloud quota provider

Adds ollama-cloud quota provider that reads auth cookie from
~/.config/ollama-quota/cookie and fetches usage from ollama.com/settings.
Returns 3 windows: session, weekly, and premium (X/Y). Reuses Ollama
logo via provider alias.

* docs(quota): add ollama-cloud provider entry to DOCUMENTATION.md

packages/ui/src/hooks/useProviderLogo.ts

@@ -22,6 +22,7 @@ const LOGO_ALIAS = new Map<string, string>([
     ['gemini', 'google'],
     ['evroc-ai', 'evroc'],
     ['evrocai', 'evroc'],
+    ['ollama-cloud', 'ollama'],
 ]);
 
 const normalizeProviderId = (providerId: string | null | undefined) => {