Docs: Restructuring and new layout

This patch implements a set of user-experiences aimed
changes.It modifies the documentation structure and
switches to a more reactive design for the rtd theme.

* The documentation layout has been redesigned to be more
  intuitive,easier to maintain and and scale.
* The landing page introduces a new dashboard.
* Introduced dedicated space for release documents, and
  changelog has been modified to directly source content
  from referenced documents.
* Added quick-link navigation for items that need emphasis.
* Relevant design documents can now be grouped in suf-folders.
* There is dedicated space for custom platform, and third
  party tools documents.
* Wildcard and regex matching has been introduced to indexes.

Change-Id: Ib02d17d5d26187d397ba17317788cf2a01401b07
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
diff --git a/docs/design_documents/tfm_profile_small.rst b/docs/design_documents/tfm_profile_small.rst
index 1353bbf..d427aab 100644
--- a/docs/design_documents/tfm_profile_small.rst
+++ b/docs/design_documents/tfm_profile_small.rst
@@ -703,15 +703,15 @@
 
 .. [6] `Transitioning the Use of Cryptographic Algorithms and Key Lengths <https://www.nist.gov/publications/transitioning-use-cryptographic-algorithms-and-key-lengths>`_
 
-.. [7] :doc:`ITS integration guide </docs/user_guides/services/tfm_its_integration_guide>`
+.. [7] :doc:`ITS integration guide </docs/reference/services/tfm_its_integration_guide>`
 
 .. [8] `PSA Attestation API 1.0 (ARM IHI 0085) <https://developer.arm.com/-/media/Files/pdf/PlatformSecurityArchitecture/Implement/IHI0085-PSA_Attestation_API-1.0.2.pdf?revision=eef78753-c77e-4b24-bcf0-65596213b4c1&la=en&hash=E5E0353D612077AFDCE3F2F3708A50C77A74B2A3>`_
 
-.. [9] :doc:`Secure boot </docs/user_guides/tfm_secure_boot>`
+.. [9] :doc:`Secure boot </docs/getting_started/tfm_secure_boot>`
 
 .. [10] :doc:`Crypto design </docs/design_documents/tfm_crypto_design>`
 
-.. [11] :doc:`TF-M build instruction </docs/user_guides/tfm_build_instruction>`
+.. [11] :doc:`TF-M build instruction </docs/getting_started/tfm_build_instruction>`
 
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