add top level anonymous id method

[wenxi-zeng]

• add top level anonymous id method
• add top level version method
• add unit tests for the above

[codecov-commenter]

Codecov Report

Merging #78 (e12ee5c) into main (98966a0) will decrease coverage by 0.01%.
The diff coverage is 70.83%.

@@             Coverage Diff              @@
##               main      #78      +/-   ##
============================================
- Coverage     77.83%   77.82%   -0.02%     
- Complexity      427      436       +9     
============================================
  Files            64       64              
  Lines          5427     5451      +24     
  Branches        684      688       +4     
============================================
+ Hits           4224     4242      +18     
  Misses          679      679              
- Partials        524      530       +6     

Impacted Files	Coverage Δ
.../analytics/kotlin/core/compat/JavaAnalyticsTest.kt	67.04% <50.00%> (-0.27%)	⬇️
...om/segment/analytics/kotlin/core/AnalyticsTests.kt	78.27% <63.63%> (-0.58%)	⬇️
...ava/com/segment/analytics/kotlin/core/Analytics.kt	76.28% <85.71%> (+0.44%)	⬆️
...ment/analytics/kotlin/core/compat/JavaAnalytics.kt	68.08% <100.00%> (+1.41%)	⬆️
...n/java/com/segment/analytics/kotlin/core/Events.kt	46.23% <0.00%> (+0.53%)	⬆️

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[prayansh]

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