meta(readme): add a dependency graph.

README.md

@@ -18,3 +18,20 @@ The core packages and the respective documentation of their system is listed her
 | [bob.pad.base](https://gitlab.idiap.ch/bob/bob.pad.base) | [README](https://gitlab.idiap.ch/bob/bob.pad.base/-/blob/master/README.rst) | [![docs](https://img.shields.io/badge/docs-stable-yellow.svg)](https://www.idiap.ch/software/bob/docs/bob/bob.pad.base/stable/index.html) | [![docs](https://img.shields.io/badge/docs-latest-orange.svg)](https://www.idiap.ch/software/bob/docs/bob/bob.pad.base/master/index.html) |
 | [bob.pad.face](https://gitlab.idiap.ch/bob/bob.pad.face) | [README](https://gitlab.idiap.ch/bob/bob.pad.face/-/blob/master/README.rst) | [![docs](https://img.shields.io/badge/docs-stable-yellow.svg)](https://www.idiap.ch/software/bob/docs/bob/bob.pad.face/stable/index.html) | [![docs](https://img.shields.io/badge/docs-latest-orange.svg)](https://www.idiap.ch/software/bob/docs/bob/bob.pad.face/master/index.html) |
 | [bob.fusion.base](https://gitlab.idiap.ch/bob/bob.fusion.base) | [README](https://gitlab.idiap.ch/bob/bob.fusion.base/-/blob/master/README.rst) | [![docs](https://img.shields.io/badge/docs-stable-yellow.svg)](https://www.idiap.ch/software/bob/docs/bob/bob.fusion.base/stable/index.html) | [![docs](https://img.shields.io/badge/docs-latest-orange.svg)](https://www.idiap.ch/software/bob/docs/bob/bob.fusion.base/master/index.html) |
+
+## Dependencies chart
+
+```mermaid
+flowchart TD;
+bob[<a href='https://gitlab.idiap.ch/bob/bob'>bob</a>] ---> bob.io.base[<a href='https://gitlab.idiap.ch/bob/bob.io.base'>bob.io.base</a>]
+bob ---> bob.learn.em[<a href='https://gitlab.idiap.ch/bob/bob.learn.em'>bob.learn.em</a>] ---> bob.bio.base[<a href='https://gitlab.idiap.ch/bob/bob.bio.base'>bob.bio.base</a>]
+bob.io.base ---> bob.measure[<a href='https://gitlab.idiap.ch/bob/bob.measure'>bob.measure</a>] ---> bob.bio.base
+bob.io.base ---> bob.pipelines[<a href='https://gitlab.idiap.ch/bob/bob.pipelines'>bob.pipelines</a>] ---> bob.bio.base
+bob.bio.base ---> bob.bio.face[<a href='https://gitlab.idiap.ch/bob/bob.bio.face'>bob.bio.face</a>] ---> bob.bio.video[<a href='https://gitlab.idiap.ch/bob/bob.bio.video'>bob.bio.video</a>]
+bob.bio.base ---> bob.bio.spear[<a href='https://gitlab.idiap.ch/bob/bob.bio.spear'>bob.bio.spear</a>]
+bob.bio.base ---> bob.bio.vein[<a href='https://gitlab.idiap.ch/bob/bob.bio.vein'>bob.bio.vein</a>]
+bob.bio.base ---> bob.pad.base[<a href='https://gitlab.idiap.ch/bob/bob.pad.base'>bob.pad.base</a>] ---> bob.pad.face[<a href='https://gitlab.idiap.ch/bob/bob.pad.face'>bob.pad.face</a>]
+bob.bio.video --> bob.pad.face
+bob.bio.base ---> bob.fusion.base[<a href='https://gitlab.idiap.ch/bob/bob.fusion.base'>bob.fusion.base</a>]
+bob.pad.base ---> bob.fusion.base
+```