chore(kendra): go binding issue and deps upgrade

[krokoko]

Fixes #

Fixed the Go binding issues in the Kendra module and upgrade deps. The main problem was a namespace conflict. The Kendra namespace conflicted with the kendra module name when generating Go bindings, causing Edition, UserContextPolicy, and IndexFieldTypes to be undefined.

• Exported enums at the module level with prefixed names:
  • KendraEdition (instead of Kendra.Edition)
  • KendraIndexFieldTypes (instead of Kendra.IndexFieldTypes)
  • KendraUserContextPolicy (instead of Kendra.UserContextPolicy)
• Kept backward compatibility: the Kendra namespace remains with deprecated enums that reference the same values, so existing TypeScript code continues to work.
• Updated all references in KendraGenAiIndex to use the new enum names directly.
• JSDoc format; the dash after @default was causing a syntax error in the generated Go code.

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