docs: Documentation restructure

- Change main index structure
- Sort out integration and porting guidelines
- Resort table with releases
- Add Tools section. To be adjusted further for tf-m-tools

Intention to minimise files movement to simplify review process.
Affected files shall be moved later after the new structure agreement.

Signed-off-by: Anton Komlev <anton.komlev@arm.com>
Change-Id: I0352bebabe09d4f7b5e8848ee620c0cea6881c94
diff --git a/docs/getting_started/index.rst b/docs/getting_started/index.rst
index 9e58827..e4e723a 100644
--- a/docs/getting_started/index.rst
+++ b/docs/getting_started/index.rst
@@ -2,10 +2,6 @@
 ======================
 .. toctree::
     :maxdepth: 1
-    :glob:
 
-    tfm_getting_started
+.. include:: tfm_getting_started.rst
 
---------------
-
-*Copyright (c) 2020-2021, Arm Limited. All rights reserved.*