feat: add environment variable support

[brianheineman]

No description provided.

[github-actions]

Bencher Report

Branch	add-environment-variable-support
Testbed	localhost

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• Latency

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Benchmark	Latency	nanoseconds (ns)
from_bytes	📈 view plot ⚠️ NO THRESHOLD	25,505.00
load_hash_map	📈 view plot ⚠️ NO THRESHOLD	29,598.00
load_invalid_class	📈 view plot ⚠️ NO THRESHOLD	27,305.00
runtime_v11	📈 view plot ⚠️ NO THRESHOLD	53,597,000.00
runtime_v17	📈 view plot ⚠️ NO THRESHOLD	51,200,000.00
runtime_v21	📈 view plot ⚠️ NO THRESHOLD	55,456,000.00
runtime_v8	📈 view plot ⚠️ NO THRESHOLD	37,611,000.00
to_bytes	📈 view plot ⚠️ NO THRESHOLD	21,887.00
to_string	📈 view plot ⚠️ NO THRESHOLD	139,570.00
verify	📈 view plot ⚠️ NO THRESHOLD	928.07

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[codecov]

Codecov Report

Attention: Patch coverage is 96.28866% with 18 lines in your changes missing coverage. Please review.

Project coverage is 96.62%. Comparing base (7f3a5ab) to head (1d07c59).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...src/native_methods/java_lang_processenvironment.rs	23.52%	13 Missing ⚠️
...tto_vm/src/native_methods/java_lang_processimpl.rs	57.14%	3 Missing ⚠️
ristretto_vm/src/vm.rs	33.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #98      +/-   ##
==========================================
- Coverage   96.63%   96.62%   -0.02%     
==========================================
  Files         129      131       +2     
  Lines       23677    24034     +357     
==========================================
+ Hits        22881    23223     +342     
- Misses        796      811      +15     

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