Package upgrade

[thivy]

This pull request adds a new context and hook to provide a way to access global configuration options throughout the app. It also changes the environment variable name for speechEnabled from NEXT_PUBLIC_SPEECH_ENABLED to PUBLIC_SPEECH_ENABLED and updates all relevant files to use the new name.

Main interface changes:

• src/features/global-config/global-client-config-context.tsx: Added a new context GlobalConfigContext and a hook useGlobalConfigContext to provide a way to access global configuration options like speechEnabled throughout the app.
• src/app/layout.tsx: Added the GlobalConfigProvider as a parent component to the Providers component, with the config prop passed to it including speechEnabled set to the value of the environment variable PUBLIC_SPEECH_ENABLED.
• src/features/chat/chat-ui/chat-input/chat-input.tsx: Updated chat-input.tsx to use the useGlobalConfigContext hook to assign the value of speechEnabled, replacing the use of the environment variable NEXT_PUBLIC_SPEECH_ENABLED. [1] [2]
• src/type.ts: Added a new environment variable PUBLIC_PUBLIC_SPEECH_ENABLED to src/type.ts.

Configuration improvements:

• src/app/change-log/update.md: Changed the environment variable name NEXT_PUBLIC_SPEECH_ENABLED to PUBLIC_SPEECH_ENABLED in the update log for the Azure Chat Solution accelerator.
• docs/7-environment-variables.md: Changed the environment variable name NEXT_PUBLIC_SPEECH_ENABLED to PUBLIC_SPEECH_ENABLED.
• src/.env.example: Renamed NEXT_PUBLIC_SPEECH_ENABLED to PUBLIC_SPEECH_ENABLED.
• docs/3-run-locally.md: Changed the environment variable name NEXT_PUBLIC_SPEECH_ENABLED to PUBLIC_SPEECH_ENABLED.