add feature: config summarisation, context compression, caching

[Insomniac2904]

adds feature for #1173.

example use case:

apiVersion: kagent.dev/v1alpha2
kind: Agent
metadata:
  name: storage-agent
spec:
  declarative:
    context:
      cache:
        enabled: true
        cacheIntervals: 5
        minTokens: 200
        ttlSeconds: 3600

      compression:
        enabled: true
        compactionInterval: 10
        overlapSize: 50
        summarizer:
          type: llm
          model: gpt-4o-mini

      windowCompression:
        enabled: true
        maxLength: 4096

[peterj]

this only adds the configuration options to the resources - are the features actually implemented in the ADK library too?

[Insomniac2904]

this only adds the configuration options to the resources - are the features actually implemented in the ADK library too?

Hey @peterj you were right. I could not find the context config for golang, only for python. I have revert back the original changes and made the changes to types.py and _a2a.py files. Also i am not sure for the imports that needs to me made for windowCompression and thus i have not implemented it as of now. Also could you please point me to the right test file, so that i can check my changes.
Thanks.