feat(api): Add the possibility to save results from external source

[vvatelot]

To use this new feature, add the environment variable API_KEYS_BATCH like

API_KEYS_BATCH='{"key": "random_key", "name":"Example key", "description": "This key is used to authenticate batch import of results as an example", "source": "ecoindex.fr"}'

[github-actions]

Branch coverage •

File	Stmts	Miss	Cover	Missing
bases/ecoindex/cli
app.py	94	43	54%	138–141, 143, 158–159, 173, 206–207, 209, 217, 226–227, 229, 238–241, 243, 245–246, 251, 255–256, 258, 260, 263, 265–267, 269–270, 273–275, 283, 287, 319, 321, 329, 333, 337
components/ecoindex/compute
ecoindex.py	29	1	96%	49
components/ecoindex/config
settings.py	22	0	100%
components/ecoindex/models
compute.py	65	5	92%	111, 113, 116, 118, 134
components/ecoindex/scraper
scrap.py	96	53	44%	51, 54–55, 57, 66, 69, 72–73, 76, 90–98, 101–105, 107, 109, 116–119, 126–128, 130–139, 148–149, 152–153, 155, 164–165, 170–171, 175–176
TOTAL	704	229	67%