Add fixture stefanelp2/stoof2

[FloEdelmann]

• Update manufacturers.json
• Add fixture stefanelp2/stoof2

Thank you stoof!

[github-actions]

Export files validity

(Output of test script tests/github/exports-valid.js.)

Test the exported files of selected fixtures against the plugins' export tests.
You can run a plugin's export tests by executing:
$ node cli/run-export-test.js -p <plugin name> <fixtures>

✔️ stefanelp2 / stoof2: d-light / attributes-correctness

• ✔️ stefanelp2/stoof2-stefanelp1.xml

✔️ stefanelp2 / stoof2: dmxcontrol3 / channel-numbers

• ✔️ stefanelp2-stoof2-stefanelp1.xml

✔️ stefanelp2 / stoof2: dragonframe / json-schema-conformity

• ✔️ stefanelp2/stoof2.json
• ✔️ manufacturers.json

✔️ stefanelp2 / stoof2: millumin / json-schema-conformity

• ✔️ stefanelp2/stoof2.json

❌ stefanelp2 / stoof2: qlcplus_4.12.2 / fixture-tool-validation

• ❌ fixtures/stefanelp2-stoof2.qxf

  Namespace(map=False, convert=None, validate=['.'], report=None) Starting validation ./manufacturer/fixture.qxf:stefanelp1: No physical data found 1 definitions processed. 1 errors detected

✔️ stefanelp2 / stoof2: qlcplus_4.12.2 / xsd-schema-conformity

• ✔️ fixtures/stefanelp2-stoof2.qxf