chore: naming inconsistency project grants (#11488)

# Which Problems Are Solved

As part of the consistent naming effort, this PR focuses on "Project
Grants".

# How the Problems Are Solved

All terms referring to a project being granted to another organization
for self-management were changed to "Project Grant" or "project grant".

# Additional Changes

None

# Additional Context

- closes #11287

apps/docs/content/apis/openidoauth/authrequest.mdx

@@ -33,7 +33,7 @@ The <span className="text-yellow-500">Custom Domain</span> to your ZITADEL insta
 <p>
   <span className="text-green-500">Client ID</span> is the resource id of an
   application. It's the application where you want your users to login. You can
-  find the resource id in the Console. When using organization grants, use the
+  find the resource id in the Console. When using project grants, use the
   client id from the origin organization.
 </p>