Add Ollama as LLM provider option (#494)

.vscode/settings.json

README.md

docker/.env.example

...nd/src/components/LLMSelection/OllamaLLMOptions/index.jsx

frontend/src/media/llmprovider/ollama.png

frontend/src/pages/GeneralSettings/LLMPreference/index.jsx

...boardingFlow/OnboardingModal/Steps/DataHandling/index.jsx

...boardingFlow/OnboardingModal/Steps/LLMSelection/index.jsx

server/.env.example

server/models/systemSettings.js

server/utils/AiProviders/ollama/index.js

server/utils/chats/stream.js

server/utils/helpers/customModels.js

server/utils/helpers/index.js

server/utils/helpers/updateENV.js