implement a Profile Analytics app

[janzandr]

Requested by @geo-masc.

We already have a prototyp tool (Temporal Profile Analytics), which is connected to the RasterDataPlotting plugin. It gets the current profile, calls a user-defined function on it, which can return text/symbol/line annotations.

E.g. in this example, we see the original profile as a red line with white dots, together with 4 symbol annotations as green pentagons, and a line annotation in blue.

@geo-masc already uses it for identifying mowing events on temporal profiles.

It is proposed to integrate this tool into the EnMAP-Box and QGIS GUI.
You user should be able to choose from different profile sources like:

• selecting a single/multiple raster layers (this will work in stand-alone QGIS)
• selecting a single EnMAP-Box SpectralView, which may contain multiple profiles (this required the EnMAP-Box GUI)

In case of a raster layer, the profile is updated, whenever the current location changes, i.e. those map tools are used:

[janzandr]

In this first version, we can visualize multiple raster pixel profiles against band number, wavelength or date time.
The user can select a user-defined function that can analyse the data and plot additional annotations into the plot.
E.g. here we have a Sentinel-2 and a Landsat profile. The user-function "simple.py" adds a red cross and a blue line into the plot:

The code looks like this:

[janzandr]

@jakimowb many thanks for the classes in the QPS plotstyling submodul. It was really handy using them for styling PlotDataItems.