feat: process values.yaml files

[qvalentin]

The plan would be to support the following for values.yaml files:

• autocompletion
• go-to-references

TOOD:

• check that yamlls autocomplete is still working
• Make valuesfiles use the document store, to only store them once and remove WatchedFiles

[qvalentin]

@CodiumAI-Agent /review

[CodiumAI-Agent]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 4 🔵🔵🔵🔵⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Refactoring Needed The TemplateHandler class has multiple responsibilities (handling templates, diagnostics, hover, completion, etc.), which could be split into more focused classes to improve maintainability and testability. Performance Concern The DocumentStore class uses a sync.Map which might not be the most efficient structure for the use case, especially under high load or large number of documents. Consider benchmarking and possibly using alternative data structures. Error Handling The NewConnector function in yamlls.go starts a subprocess for YAML language server but does not handle potential errors robustly, such as failure to start the process or issues with the command path.