python3-dotenv: add recipe
python3-dotenv: add recipe

Shell Command and Library to write and read .env like files, it's being
required by python3-docker-compose upper than 1.26.0.

Signed-off-by: Ming Liu <9cf200288bdd565bead80486d2a5bb21c1250e06@toradex.com>
Signed-off-by: Bruce Ashfield <284cc737d174a260eec2a2a6324a304f84b1ae0f@gmail.com>

lgirdk/meta-virtualization,lgirdk/meta-virtualization,lgirdk/meta-virtualization,lgirdk/meta-virtualization,lgirdk/meta-virtualization