[ot] scripts/opentitan: add Python requirement file

Signed-off-by: Emmanuel Blot <eblot@rivosinc.com>

Author: rivos-eblot

docs/opentitan/tools.md

@@ -2,6 +2,17 @@
 
 All the OpenTitan tools and associated files are stored in the `scripts/opentitan` directory.
 
+## Installation
+
+Most tools are implemented in Python language. They require Python 3.10 or newer.
+
+It is recommended to install Python dependencies using a [virtual environment](https://virtualenv.pypa.io).
+
+To install Python dependencies, use:
+```sh
+pip3 install -r scripts/opentitan/requirements.txt
+```
+
 ## Execution wrapper
 
 Launching a QEMU VM with the right option switches may rapidly become complex due to the number

scripts/opentitan/requirements.txt

@@ -0,0 +1,6 @@
+# Python requirements
+pylint>=3.3.3
+pyyaml>=6
+hjson>=3.1
+pyelftools>=0.30
+