erp5_wendelin: add custom panel gadget for wendelin ui with links to portal callables and ingestion policies

erp5_wendelin: dd wendelin UI (for data engineers) web site and web pages to this bt5 instead of data_lake_ui bt5

See merge request nexedi/wendelin!57

See merge request nexedi/wendelin!53

See merge request nexedi/wendelin!43

erp5_wendelin: Since ERP5's 7c72a3547026b9e8594e2e67a457a3db9b5b2c62 Document component is no longer on file-system thus adjust imports accordingly

erp5_wendelin: Since ERP5's 7c72a3547026b9e8594e2e67a457a3db9b5b2c62 File component is no longer on file-system thus adjust imports accordingly (and add its bt5).

- test updated

- server script and ui changes

without modification.

Add default ingestion policy and parsing script to parse dotted reference
by sensor and data product

Add api to data stream for unpacking msgpack and extracting fluentd
style datetime

- remove hardcoded relative urls
- use renderJS API to properly get the links urls
- fix html titles
- fix headers
- JSLint cleanup

See merge request nexedi/wendelin!55

See merge request nexedi/wendelin!54

See merge request nexedi/wendelin!52

See merge request nexedi/wendelin!51

See merge request !50