Add FlexMeasures plugins, USEF protocol, and Cariflex simulator

- flexmeasures-entsoe: ENTSO-E data plugin
- flexmeasures-weather: Weather data plugin
- USEF Flex Trading Protocol PDF (2.4MB)
- Cariflex simulator (publishes to Redis)
- Dashboard Grafana updated with correct InfluxDB queries
- All tools extracted in /tools/

tools/flexmeasures-entsoe/.pre-commit-config.yaml

@@ -0,0 +1,19 @@
+repos:
+-   repo: https://github.com/pycqa/flake8
+    rev: 6.0.0  # New version tags can be found here: https://github.com/pycqa/flake8/tags
+    hooks:
+    - id: flake8
+      name: flake8 (code linting)
+-   repo: https://github.com/psf/black
+    rev: 22.10.0  # New version tags can be found here: https://github.com/psf/black/tags
+    hooks:
+    - id: black
+      name: black (code formatting)
+-   repo: local
+    hooks:
+    - id: mypy
+      name: mypy (static typing)
+      pass_filenames: false
+      language: script
+      entry: run_mypy.sh
+      verbose: true