[Relax][Doc] Visualize Relax

- Add a diagram to the document to visually represent interactions
between Relax components and their dependencies
- Fix typos

Author: vacu9708

docs/arch/diagrams/relax-block_diagram.png

@@ -299,9 +299,16 @@ tvm/relax
 ---------
 
 Relax is the high-level IR used to represent the computational graph of a model. Various optimizations are defined in ``relax.transform``.
-Note that Relax usually works closely the the TensorIR IRModule, most of the transformations are applied on the both Relax and TensorIR functions
+Note that Relax usually works closely with the TensorIR IRModule, most of the transformations are applied on both Relax and TensorIR functions
 in the IRModule. Please refer to the :ref:`Relax Deep Dive <relax-deep-dive>` for more details.
 
+.. figure:: https://raw.githubusercontent.com/apache/tvm/main/docs/arch/diagrams/relax-sequence_diagram.png
+   :align: center
+   :width: 80%
+.. figure:: https://raw.githubusercontent.com/apache/tvm/main/docs/arch/diagrams/relax-block_diagram.png
+   :align: center
+   :width: 80%
+
 tvm/tir
 -------