[Obs AI Assistant] Archiving conversations

[viduni94]

Closes #209386

Summary

1. The option to archive conversations are enabled via the conversation contextual menu.
2. Archived conversations can be viewed under the "Archived" section of the conversation list.
3. Only the owner of the conversation can archive and unarchive.
4. Once archived, the conversation cannot be continued until unarchived.
5. If the archived conversation is shared, other users (who are not the owner) can duplicate the conversation, if they wish to continue the conversation.
6. The archived section of the conversation list is collapsed by default.
7. Updating the conversation such as title updates, regenerating, providing chat feedback are disabled for archived conversations

Checklist

• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Unit or functional tests were updated or added to match the most common scenarios
• Flaky Test Runner was used on any tests changed
• The PR description includes the appropriate Release Notes section, and the correct release_note:* label is applied per the guidelines

[elasticmachine]

Pinging @elastic/obs-ai-assistant (Team:Obs AI Assistant)

[github-actions]

🤖 GitHub comments

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Just comment with:

• /oblt-deploy : Deploy a Kibana instance using the Observability test environments.
• run docs-build : Re-trigger the docs validation. (use unformatted text in the comment!)

[kibanamachine]

Flaky Test Runner Stats

🎉 All tests passed! - kibana-flaky-test-suite-runner#8118

[✅] x-pack/test/api_integration/deployment_agnostic/configs/stateful/oblt.stateful.config.ts: 25/25 tests passed.
[✅] x-pack/test/api_integration/deployment_agnostic/configs/serverless/oblt.serverless.config.ts: 25/25 tests passed.

see run history

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: bd55be8
• Kibana Serverless Image: docker.elastic.co/kibana-ci/kibana-serverless:pr-216012-bd55be86d9ce

Metrics [docs]

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
@kbn/ai-assistant	102	105	+3
observabilityAIAssistant	387	389	+2
total			+5

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
observabilityAIAssistantApp	265.0KB	269.7KB	+4.7KB
searchAssistant	158.9KB	163.6KB	+4.7KB
total			+9.4KB

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
observabilityAIAssistant	38.2KB	38.3KB	+105.0B

Unknown metric groups

API count

id	before	after	diff
@kbn/ai-assistant	102	105	+3
observabilityAIAssistant	389	391	+2
total			+5

History

• 💛 Build #287944 was flaky 0a1c8b7
• 💔 Build #287942 failed 497060c
• 💔 Build #287751 failed 5889c4d
• 💔 Build #287720 failed e7d6ce3

cc @viduni94