Split NeTEx docs into tutorial and profile information

[leonardehrenfried]

Summary

The documentation page on NeTEx is a few years old and configuration has changed a lot since it was written. It's also a little vague about which profiles are supported.

Therefore I have split up the documentation into two pages:

• one for setting up a Norwegian OTP instance
• one for information about the NeTEx profiles and our position on them

Documentation

✔️

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.79%. Comparing base (048a219) to head (be23c02).
Report is 36 commits behind head on dev-2.x.

Additional details and impacted files

@@            Coverage Diff             @@
##             dev-2.x    #6062   +/-   ##
==========================================
  Coverage      69.78%   69.79%           
- Complexity     17357    17358    +1     
==========================================
  Files           1962     1962           
  Lines          74359    74357    -2     
  Branches        7624     7623    -1     
==========================================
+ Hits           51894    51895    +1     
+ Misses         19821    19819    -2     
+ Partials        2644     2643    -1     

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[leonardehrenfried]

cc @rcavaliere

[leonardehrenfried]

@BredeD Can you take a look at the NeTEx profile document? https://github.com/opentripplanner/OpenTripPlanner/pull/6062/files#diff-872614672b930425f0219b9d963adf9af401799d42c4073092811b7641aec766

[leonardehrenfried]

@jtorin I ended up fixing the typo before the merge.