Python: feat: Add ChatKit integration with a sample application (#1273)

* feat: Add ChatKit integration with a new frontend application

- Created a new frontend application using React and Vite for the ChatKit integration.
- Added essential files including package.json, vite.config.ts, and Tailwind CSS configuration.
- Implemented core components: App, Home, ChatKitPanel, ThemeToggle, and hooks for color scheme management.
- Established SQLite-based store implementation for ChatKit data persistence in store.py.
- Integrated theme toggling functionality for light and dark modes.
- Set up ESLint and TypeScript configurations for better development experience.

* git ignore

* fix mypy

* add mising file

* minimal frontend for chatkit sample

* update ignore files

* version

* set python version lowerbound on chatkit

* update project settings for chatkit

* update setup

* update setup

* update setup

* update setup

* weather widget

* add select city widget sample

* remove widget helper

* update chatkit to include file attachments and cover more thread item types

* update readme with mermaid diagram

* update diagram

* update instructions

* update chatkit dependency

* fix converter imports

* move to demos/

* move to demos/ -- rename references

* support multiple session instead of using global variable in sample

* support chunk streaming

* fix tests

* Update python/samples/demos/chatkit-integration/store.py

Co-authored-by: Evan Mattson <35585003+moonbox3@users.noreply.github.com>

* use local host

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Co-authored-by: Evan Mattson <35585003+moonbox3@users.noreply.github.com>

python/.pre-commit-config.yaml

@@ -14,7 +14,7 @@ repos:
       - id: check-json
         name: Check JSON files
         files: \.json$
-        exclude: ^.*\.vscode\/.*
+        exclude: ^.*\.vscode\/.*|^python/demos/samples/chatkit-integration/frontend/(tsconfig.*\.json|package-lock\.json)$
       - id: end-of-file-fixer
         name: Fix End of File
         files: \.py$