fix: settings action

[tcm390]

related: https://linear.app/eliza-labs/issue/ELI2-150/hallucinations-in-actions-and-response-of-agents

Currently, I haven’t been able to get the onboarding settings to work due to a few issues:

1. The agent keeps selecting UPDATE_SETTINGS even when I haven’t said anything. It immediately replies with:
   "I couldn't understand your settings update. Please try again with a clearer format."

It also seems unaware of the current settings and ends up hallucinating them.

2. After fixing the above issue, I still couldn’t apply settings because the result gets cleaned to an empty object if it’s not an array:
   

   eliza/packages/core/src/actions/settings.ts

   Line 391 in e20bd81

   if (!result || !Array.isArray(result)) {

I also noticed that the LLM sometimes returns a different structure instead of an array. For example:

{
  settings: {
    SHOULD_GREET_NEW_PERSONS: "true",
    GREETING_CHANNEL: "test2",
  },
}

{
    SHOULD_GREET_NEW_PERSONS: "yes",
}

So in this PR, I added a function that extracts valid key-value pairs from the result.

3. Even after fixing those issues, I still couldn’t update the settings that were already configured.

This PR fixes the above issues.

result:

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