readme: add local links to documentation

Signed-off-by: perigoso <perigoso@riseup.net>

README.rst

@@ -1,8 +1,6 @@
 .. figure:: docs/assets/logo.svg
    :alt: TinyUSB
 
-   TinyUSB
-
 |Build Status| |Documentation Status| |License|
 
 TinyUSB is an open-source cross-platform USB Host/Device stack for
@@ -12,13 +10,26 @@ the non-ISR task function.
 
 Please take a look at the online `documentation <www.tinyusb.org>`__.
 
-Contributors
+Local Docs
-============
+==========
 
-Special thanks to all the people who spent their precious time and
+- Info
-effort to help this project so far. Check out the
+
-`CONTRIBUTORS <CONTRIBUTORS.rst>`__ file for the list of all
+  - `Uses`_
-contributors and their awesome work for the stack.
+  - `Changelog`_
+  - `Contributors`_
+
+- `Reference`_
+
+  - `Supported Devices`_
+  - `Gettin Started`_
+  - `Concurrency`_
+
+- `Contributing`_
+
+  - `Code of Conduct`_
+  - `Structure`_
+  - `Porting`_
 
 License
 =======
@@ -29,9 +40,23 @@ individually licensed especially those in ``lib`` and ``hw/mcu`` folder.
 Please make sure you understand all the license term for files you use
 in your project.
 
+
 .. |Build Status| image:: https://github.com/hathach/tinyusb/workflows/Build/badge.svg
    :target: https://github.com/hathach/tinyusb/actions
 .. |Documentation Status| image:: https://readthedocs.org/projects/tinyusb/badge/?version=latest
    :target: https://openinput.readthedocs.io/en/latest/?badge=latest
 .. |License| image:: https://img.shields.io/badge/license-MIT-brightgreen.svg
    :target: https://opensource.org/licenses/MIT
+
+
+.. _Uses: docs/info/uses.rst
+.. _Changelog: docs/info/changelog.rst
+.. _Contributors: CONTRIBUTORS.rst
+.. _Reference: docs/reference/index.rst
+.. _Supported Devices: docs/reference/supported.rst
+.. _Gettin Started: docs/reference/getting_started.rst
+.. _Concurrency: docs/reference/concurrency.rst
+.. _Contributing: docs/contributing/index.rst
+.. _Code of Conduct: CODE_OF_CONDUCT.rst
+.. _Structure: docs/contributing/structure.rst
+.. _Porting: docs/contributing/porting.rst