dist/tools/bmp: in-line dependencies using PEP 723

PEP 723 is an accepted proposal to in-line script metadata. One such
use cases is to put script dependencies inside the script, which makes
the requirements.txt redundant [1].

With the correct shebang, it becomes even possible to run the script
directly, without creating a virtual environment and installing
dependencies in advance.

Combining both makes the execution of single-file scripts within RIOT
much easier and friendlier.

PEP 723 metadata can be used by `pipx` [2] and can be easily
installed when `pip` is available.

[1] `pip install` still requires a requirements.txt, which is
    generally accepted during development. An open issue exists to
    add support for reading dependencies from PEP 723 as well. See
    pypa/pip#12891
[2] https://github.com/pypa/pipx

dist/tools/bmp/bmp.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env -S pipx run
 
 # Copyright (C) 2019 Otto-von-Guericke-Universität Magdeburg
 #
@@ -9,6 +9,17 @@
 # @author   Maximilian Deubel <[email protected]>
 # @author   Bas Stottelaar <[email protected]>
 
+# /// script
+# requires-python = ">=3.10"
+# dependencies = [
+#   "humanize",
+#   "packaging",
+#   "progressbar",
+#   "pygdbmi",
+#   "pyserial"
+# ]
+# ///
+
 # Black Magic Probe helper script
 # This script can detect connected Black Magic Probes and can be used as a flashloader and much more
 

dist/tools/bmp/requirements.txt

@@ -1,5 +1,7 @@
+# Dependencies are listed as PEP 723 metadata in `bmp.py`. This file exists
+# for compatibility reasons.
 humanize
 packaging
+progressbar
 pygdbmi
-pyserial
-progressbar
+pyserial