[Doc] Create new decision diagram for choosing the right BigDL libraries

[Oscilloscope98]

For included in ReadtheDocs webpage, instead of generating from graphviz/mermaid, we could draw the decision diagram in svg format by ourselves, and add the <a> tag to libraries manually.

Pros:

• There is no limit to the appearance of chart. We could make it look like what ever we want.

Cons:

• It will take a little bit more effort to update the svg diagrams than code-generated diagrams.