Add Peter Pentchev's Python solutions to 286

Also fix a couple of things in the other files:
- make the TAP test functions accept an arrayref for the command to run
  instead of a single string, since we want to run the Python solution using
  `python3 -B -u /path/to/the/program`
- fix the use of Test::More::skip() in the Self Spammer test function
- fix a shadowed variable in the Order Game test function
- correct the indentation in the documentation's "Implementation details" section
- make the README file a copy of docs/index.md instead of a wrong copy of
  a completely different project's README file
- point blog.txt to the Ringlet copy of this challenge's documentation

1 files changed, 71 insertions, 0 deletions

diff --git a/challenge-286/ppentchev/python/tox.ini b/challenge-286/ppentchev/python/tox.ini
new file mode 100644
index 0000000000..5d113b5fd0
--- /dev/null
+++ b/challenge-286/ppentchev/python/tox.ini
@@ -0,0 +1,71 @@
+# SPDX-FileCopyrightText: Peter Pentchev <roam@ringlet.net>
+# SPDX-License-Identifier: BSD-2-Clause
+
+[tox]
+minversion = 4.1
+envlist =
+  ruff
+  format
+  mypy
+isolated_build = True
+
+[defs]
+pyfiles =
+  scripts/ch-1.py \
+  scripts/ch-2.py
+
+[testenv:ruff]
+skip_install = True
+tags =
+  check
+  ruff
+  quick
+deps =
+  -r requirements/ruff.txt
+commands =
+  ruff check -- {[defs]pyfiles}
+
+[testenv:format]
+skip_install = True
+tags =
+  check
+  quick
+deps =
+  -r requirements/ruff.txt
+commands =
+  ruff check --config ruff-base.toml --select=D,I --diff -- {[defs]pyfiles}
+  ruff format --config ruff-base.toml --check --diff -- {[defs]pyfiles}
+
+[testenv:reformat]
+skip_install = True
+tags =
+  format
+  manual
+deps =
+  -r requirements/ruff.txt
+commands =
+  ruff check --config ruff-base.toml --select=D,I --fix -- {[defs]pyfiles}
+  ruff format --config ruff-base.toml -- {[defs]pyfiles}
+
+[testenv:mypy]
+skip_install = True
+tags =
+  check
+deps =
+  mypy >= 1, < 2
+setenv =
+  MYPYPATH = {toxinidir}/stubs
+commands =
+  mypy {[defs]pyfiles}
+
+[testenv:pyupgrade]
+skip_install = True
+tags =
+  check
+  manual
+deps =
+  pyupgrade >= 3, < 4
+allowlist_externals =
+  sh
+commands =
+  sh -c 'pyupgrade --py311-plus scripts/*.py'