paginate resource and stack list

[Zee2413]

Server-Side Pagination for CloudFormation LSP

Summary

Implements server-side pagination for stacks and resources, improving performance when working with large AWS accounts.

Key Changes

New: StackManager

• Manages stack caching with Map<stackId, StackSummary>
• Server tracks nextToken; client sends loadMore boolean
• Clears cache when filters change

Enhanced: ResourceStateManager

• New searchResourceByIdentifier() method for finding specific resources and adding to cache
• Appends pages to cache while maintaining pagination state

Refactored: CfnService

• Changed list stacks from do-while fetch all behavior to retrieving first page only
• Moved stack events pagination to DeploymentWorkflow

Protocol Updates

• ListStacksParams: Uses loadMore boolean instead of nextToken
• SearchResourceRequest: New protocol for resource search

Files Changed

New: StackManager.ts, StackManager.test.ts
Modified: CfnService.ts, ResourceStateManager.ts, ResourceStateTypes.ts, StackHandler.ts, ResourceHandler.ts, CfnLspProviders.ts, CfnServer.ts, DeploymentWorkflow.ts

Notes

• AWS CloudControl MaxResults is non-functional (marked "Reserved")
• CloudFormation ListStacks has no default page size

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