Expose alias field and set/remove mutations in console API

Adds an alias field to Document, Audit, and TrustCenterFile types.
Introduces setTrustCenterAlias and removeTrustCenterAlias mutations
with proper authorization and error handling.

Signed-off-by: Bryan Frimin <bryan@probo.com>

pkg/server/api/console/v1/graphql/document.graphql

@@ -269,6 +269,7 @@ type Document implements Node {
     currentPublishedMajor: Int
     currentPublishedMinor: Int
     trustCenterVisibility: TrustCenterVisibility!
+    alias: String @goField(forceResolver: true)
     organization: Organization! @goField(forceResolver: true)
 
     versions(