Add arch for 1.4

docs/en/overview/architecture.mdx

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+---
+title: Architecture
+weight: 10
+---
+
+The diagram below illustrates the architecture of the Alauda AI platform.
+
+![architecture](../../assets/architecture.png)
+
+NOTE: Alauda AI uses some general Kubernetes, ACP components including:
+
+* ALB
+* Erebus
+* kube-apiserver (kubernetes component)
+
+
+| Component | Description | Type | License |
+| --- | --- | --- | --- |
+| Lich | Alauda AI UI console | Self-developed |     |
+| aml-operator | Manages installation and life cycles of Alauda AI components | Self-developed |     |
+| aml-apiserver | Extends kubernetes api-server and provide authorization enhancements for Alauda AI API access | Self-developed |     |
+| skipper & oauth2-proxy | Proxies traffic from the global cluster to workload clusters. Traffic is authenticated by oauth2-proxy | Open source | Apache Version 2.0 |
+| aml-controller | Manages Alauda AI namespaces on workload clusters. Namespaces will be automatically configured a Model Repo space and corresponding resources. | Self-developed |     |
+| aml-api-deploy | Provides high-level APIs for "Lich" | Self-developed |     |
+| Gitlab (with Minio or S3) | Model repository backend storage and version tracking. | Open source | MIT |
+| kserve-controller | (Optionally with knative serving and istio enabled) Manages AI inference services and inference service runtimes. | Open source | Apache Version 2.0 |
+| workspace-controller | Manages workbench instances (jupyter notebooks, codeserver) | Open source | Apache Version 2.0 |
+| Volcano | Plugin to provide co-scheduling (gang-scheduling) features for AI training jobs. Also manages "volcanojob" resource to run general training workloads. | Open source | Apache Version 2.0 |
+| MLFlow | Track training, evaluation jobs by storing, visualizing metrics and artifacts | Open source | Apache Version 2.0 |
+| Fine Tuning | Experimental UI providing no-code LLM fine tunning job creation and management | Self-developed |     |
+| Kubeflow | Open source plugin providing MLOps features including: Notebooks, Tensorboard, Kubeflow pipeline, training operator. | Open source | Apache Version 2.0 |
+| Label Studio | Open source plugin for dataset labeling | Open source | Apache Version 2.0 |
+| Dify | Open source plugin for creating LLM Agents, RAG applications using a web UI | Open source | ```<br>a modified version of the Apache License 2.0<br>``` |
+| Evidently | Open source plugin for monitoring online inference service performance and data drifts | Open source | Apache Version 2.0 |
+| GPU device plugins | HAMi and nvidia gpu device plugin | Open source | Apache Version 2.0 |