Add EntityCollector

[Lipen]

This PR adds AbstractHandler and collectTo similar to AbstractFullExprSetCollector from jvm module.

[github-actions]

Lifecycle test results

78 tests  ±0   78 ✅ ±0   1m 27s ⏱️ -2s
 7 suites ±0    0 💤 ±0 
 7 files   ±0    0 ❌ ±0 

Results for commit 8691e42. ± Comparison against base commit d03090c.

♻️ This comment has been updated with latest results.

[github-actions]

Test results on JDK 8

 72 files  +1   72 suites  +1   4m 39s ⏱️ -9s
627 tests +2  614 ✅ +2  13 💤 ±0  0 ❌ ±0 
697 runs  +2  684 ✅ +2  13 💤 ±0  0 ❌ ±0 

Results for commit 8691e42. ± Comparison against base commit d03090c.

♻️ This comment has been updated with latest results.

[github-actions]

Test results on JDK 19

 72 files  +1   72 suites  +1   4m 42s ⏱️ -4s
627 tests +2  617 ✅ +2  10 💤 ±0  0 ❌ ±0 
697 runs  +2  687 ✅ +2  10 💤 ±0  0 ❌ ±0 

Results for commit 8691e42. ± Comparison against base commit d03090c.

♻️ This comment has been updated with latest results.

[github-actions]

Test results on JDK 11

 72 files  +1   72 suites  +1   5m 10s ⏱️ -1s
627 tests +2  619 ✅ +2  8 💤 ±0  0 ❌ ±0 
697 runs  +2  689 ✅ +2  8 💤 ±0  0 ❌ ±0 

Results for commit 8691e42. ± Comparison against base commit d03090c.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

Attention: Patch coverage is 8.53659% with 225 lines in your changes missing coverage. Please review.

Project coverage is 69.43%. Comparing base (d03090c) to head (8691e42).
Report is 2 commits behind head on neo.

Files with missing lines	Patch %	Lines
...ts/src/main/kotlin/org/jacodb/ets/utils/Handler.kt	5.90%	207 Missing ⚠️
.../src/main/kotlin/org/jacodb/ets/utils/GetLocals.kt	0.00%	11 Missing ⚠️
.../src/main/kotlin/org/jacodb/ets/utils/Collector.kt	61.53%	4 Missing and 1 partial ⚠️
.../src/main/kotlin/org/jacodb/ets/utils/GetValues.kt	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                neo     #301      +/-   ##
============================================
- Coverage     70.36%   69.43%   -0.94%     
- Complexity     2471     2474       +3     
============================================
  Files           269      271       +2     
  Lines         15208    15450     +242     
  Branches       2274     2282       +8     
============================================
+ Hits          10701    10727      +26     
- Misses         3577     3791     +214     
- Partials        930      932       +2     

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