Docs: Enable RTD on tf-m-tools

Added files required for the tf-m-tools documentation to be displayed on Read the Docs.

Change-Id: Id4a810f4d22b2234a7fe362d93bf623806fadcde
Signed-off-by: Elena Uziunaite <elena.uziunaite@arm.com>
diff --git a/docs/index.rst b/docs/index.rst
new file mode 100644
index 0000000..874c78a
--- /dev/null
+++ b/docs/index.rst
@@ -0,0 +1,32 @@
+################################
+Trusted Firmware-M Tools
+################################
+
+.. raw:: html
+
+.. toctree::
+  :caption: Overview
+  :maxdepth: 1
+
+  CMSIS TF-M Packs <cmsis_pack>
+  Code Size Analyze Tool <code-size-analyze-tool>
+  FIH Test Tool <fih_test_tool>
+  Initial Atestation Verifier <iat-verifier>
+  IRQ Test Tool <irq_test_tool>
+  Library Dependency Trace Tool <depend-trace-tool/depend-trace-tool>
+  Profiling <profiling>
+  SQUAD Metrics Dashboard <squad-dashboard>
+  Static Checking Framework <static_checks/index>
+  TF-Fuzz <tf_fuzz>
+  TF-M Manual Build <tf-m-manual-build>
+
+.. toctree::
+  :caption: Links
+  :maxdepth: 1
+  :hidden:
+
+  Trusted Firmware-M <https://trustedfirmware-m.readthedocs.io/en/latest/>
+
+--------------
+
+*Copyright (c) 2017-2023, Arm Limited. All rights reserved.*