so this is the beta of that HDRI tool - lumière_sky
It suggests HDRIs out of your HDRI Library based on the sun's altitude in degrees. then you can select a more specific HDRI from near the sun's altitude. This looks like a directional standard light but it actually does not light your scene by itself. After you lock in the desired HDRI, it will be put to the environment slot. the light's angle will be lockt as this rotation axis would not work on a spherical image. The arimuth however is still adjustable and will automatically turn the HDRI around its z axis.
This is the most simple and user friendly way to manage and load in HDRI's I could come up with. I wanted to combine the ease of use of normal lights with the renderquality of HDRI's (that are normally not as intuitive to setup)
If there are enough users that show interest in using this in there own workflow, there might be a way to make this public.
NOTE: the preview Image and the loaded Environment map in the sample are just placeholders for now