feat(config): close #271 Handle .env and environment variable

[vincent4vx]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 98.07692% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 96.38%. Comparing base (f4dbd13) to head (8485fa8).
Report is 1 commits behind head on master.

Files	Patch %	Lines
...eux/araknemu/core/config/env/ExpressionParser.java	96.61%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #341      +/-   ##
============================================
- Coverage     96.38%   96.38%   -0.01%     
- Complexity     9150     9189      +39     
============================================
  Files          1407     1410       +3     
  Lines         23440    23543     +103     
  Branches       1502     1520      +18     
============================================
+ Hits          22593    22692      +99     
- Misses          639      641       +2     
- Partials        208      210       +2     

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