refactor: improve readability of symbol table

Make the symbol table produced by the memory mapping script more
readable. Add a generic interface for interacting with ELF binaries.
This interface enables us to get symbols that provide some insights into
TF-A's memory usage.

Change-Id: I6646f817a1d38d6184b837b78039b7465a533c5c
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
diff --git a/docs/tools/index.rst b/docs/tools/index.rst
new file mode 100644
index 0000000..2dee2c0
--- /dev/null
+++ b/docs/tools/index.rst
@@ -0,0 +1,12 @@
+Tools
+=====
+
+.. toctree::
+   :maxdepth: 1
+   :caption: Contents
+
+   memory-layout-tool
+
+--------------
+
+*Copyright (c) 2023, Arm Limited. All rights reserved.*