Clean density calculation (#97)

* Get rid of utils

* Clean up imports

* Move some utils here

* Rename file

* Add simname to boxsize

* Add imports

* Delete old files

* Update README

* Update imports

* Add a new draft of the density calculator

* Update fields

* Draft of new density field calculatiosn

* Add snapshot

* Add boxsizes

* Little updates

* Bring back utils

* Edit docstrings

* Edits imports

* Add progress on snapshots

* edit improts

* add basic snapshot catalogue

* Add support for CSiBORG2 snapshot reader

* add paths to fofcat for csiborg2

* Add more imports

* Add more boxsize

* Add more imports

* Add field readers

* Simplify field paths

* Fix typo

* Add observer vp

* Clean up density field calculation

* Add a short note

* Edit args

* Remove old comments

* Edit docs

* Remove blank line

* Stop flipping RAMSES

* Remove comment

* Edit desc

* Remove normalization

* Remove old dist array

* Remove non-volume weighting

* Remove non-volume weight

* Add ignore of flake8 notebooks

* Fix path typo

* Fix units

* Edit paths docs

* Update nb

scripts_independent/run_process_snapshot.py

@@ -15,9 +15,8 @@
 from os import system
 
 if __name__ == "__main__":
-    # Quijote chains
-    chains = [1]
-    simname = "quijote"
+    chains = [7444]
+    simname = "csiborg1"
     mode = 2
 
     env = "/mnt/zfsusers/rstiskalek/csiborgtools/venv_csiborg/bin/python"