feat: related resources for resources already authored in template sh…

[deepfuriya]

…owed using inline completion suggestions

Description of changes:

• Created a new provider which will be triggered when the user is starting to author a new resource.
• Extracting all the resource types from the template and return top 5 related resource that the user can author next.
• Currently only displaying the resource type names in the ghost text suggestions. Next will have the actual snippets suggested instead of just resource type

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[Copilot]

Pull Request Overview

This PR introduces a new inline completion provider that suggests related AWS resources when authoring CloudFormation templates. It analyzes existing resources in the template and suggests the most relevant related resource types based on AWS service relationships.

• Adds a new RelatedResourcesInlineCompletionProvider that extracts existing resource types and suggests related ones
• Integrates the provider into the existing InlineCompletionRouter with proper context detection for new resource authoring
• Implements ranking logic to prioritize suggestions by relationship frequency and limits to top 5 results

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
src/autocomplete/RelatedResourcesInlineCompletionProvider.ts	New provider implementing the core logic for suggesting related AWS resources
src/autocomplete/InlineCompletionRouter.ts	Updated router to integrate the new provider with context-aware triggering
tst/unit/autocomplete/RelatedResourcesInlineCompletionProvider.test.ts	Comprehensive test suite for the new provider functionality
tst/unit/autocomplete/InlineCompletionRouter.test.ts	Updated router tests to accommodate the new provider integration

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[github-actions]

Package	Line Rate	Branch Rate	Complexity	Health
ai	22%	80%	0	❌
ai.llm	53%	80%	0	❌
app	0%	0%	0	❌
artifacts	100%	100%	0	✔
auth	87%	92%	0	✔
autocomplete	93%	91%	0	✔
context	95%	95%	0	✔
context.semantic	98%	97%	0	✔
context.semantic.parameter	100%	95%	0	✔
context.syntaxtree	89%	90%	0	✔
context.syntaxtree.utils	86%	91%	0	✔
datastore	77%	97%	0	❌
definition	100%	100%	0	✔
document	93%	96%	0	✔
documentSymbol	93%	81%	0	✔
handlers	75%	88%	0	❌
hover	85%	86%	0	➖
protocol	96%	100%	0	✔
resourceState	76%	80%	0	❌
schema	88%	87%	0	✔
schema.transformers	85%	84%	0	➖
server	97%	96%	0	✔
services	67%	89%	0	❌
services.cfnLint	72%	91%	0	❌
services.guard	95%	79%	0	✔
services.guard.assets	81%	77%	0	➖
settings	97%	87%	0	✔
stacks	100%	100%	0	✔
telemetry	58%	78%	0	❌
templates	89%	85%	0	✔
utils	91%	92%	0	✔
Summary	86% (16998 / 19697)	89% (3516 / 3949)	0	✔