Add SLD styles to image mosaics

[JakobMiksch]

references #145

• adds styles for the raster layers of the GeoServer from inside geoserver_init
• assigns styles to the newly created image mosaics and also to image mosaics that do not have a style yet
• the respective style (no, no2, pm10) is chosen depending on the layer name
• it also applies styles to existing layers if they do not have a style yet

[JakobMiksch]

@jdk24 I tested the PR in my mocked environment. However it would be useful to test it in a more real environment before merging.

[jdk24]

Thank you! Works as expected when tested on incoming raster with existing style until #145.

For our setup this is great. Can there be cases where searching for "_no_" in the layer name is too generic? Otherwise it's a yes from me.

[JakobMiksch]

@jdk24 Thanks for testing!!

the filtering for pollutants happens here: https://github.com/meggsimum/sauber-sdi-docker/pull/160/files#diff-ca92621faca806ac3b80fe78d54e869f91ea735480602d00a3e730e33cddc7ebR250-R256

it always searches for _no_ and not no. (Note the underscores _)

Therefore it should not confuse no2 and no. Does this make sense to you?

[jdk24]

It would've helped if I had escaped the underscores :)
My idea was to broaden the matching to _no_am1h_, etc. in case anyone names a layer ..._no_changes_... or the like.

Then again, this would make it just as project-specific, so I'm going to leave it with the approval.

[chrismayer]

Code looks good to me.

As discussed: Once the final SLDs are put into this, it can be merged.

[JakobMiksch]

@jdk24 I updated the SLD and added the ones for SIM. If this is fine for you we can merge.