Integrate Apipie support directly (#2470)

.vscode/settings.json

docker/.env.example

frontend/src/components/LLMSelection/ApiPieOptions/index.jsx

frontend/src/media/llmprovider/apipie.png

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

...end/src/pages/OnboardingFlow/Steps/DataHandling/index.jsx

...nd/src/pages/OnboardingFlow/Steps/LLMPreference/index.jsx

...WorkspaceSettings/AgentConfig/AgentLLMSelection/index.jsx

server/.env.example

server/models/systemSettings.js

server/storage/models/.gitignore

server/utils/AiProviders/apipie/index.js

server/utils/agents/aibitat/index.js

server/utils/agents/aibitat/providers/ai-provider.js

server/utils/agents/aibitat/providers/apipie.js

server/utils/agents/aibitat/providers/index.js

server/utils/agents/index.js

server/utils/helpers/customModels.js

server/utils/helpers/index.js

server/utils/helpers/updateENV.js