[LIG-10] window support

[JasonThon]

Description

1. support three event-time-based windows: fixed, sliding and session
2. support event-time-based watermark trigger

Impact Scope

1. executor initialization
2. add window impl to group data

Test Suggestions

It will be tested in CI

Tag

N/A

[codecov-commenter]

Codecov Report

Merging #20 (aa0deed) into master (50dfc7b) will increase coverage by 2.75%. The diff coverage is 72.78%.

@@            Coverage Diff             @@
##           master      #20      +/-   ##
==========================================
+ Coverage   69.44%   72.19%   +2.75%     
==========================================
  Files          21       21              
  Lines        1666     1892     +226     
==========================================
+ Hits         1157     1366     +209     
- Misses        509      526      +17     

Impacted Files	Coverage Δ
src/stream/src/dataflow.rs	60.33% <0.00%> (+1.90%)	:arrow_up:
src/stream/src/err.rs	13.33% <ø> (ø)
src/common/src/utils.rs	73.56% <57.14%> (-1.44%)	:arrow_down:
src/stream/src/actor.rs	67.72% <63.07%> (+6.46%)	:arrow_up:
src/stream/src/window.rs	80.44% <80.44%> (ø)
src/common/src/collections/lang.rs	79.31% <100.00%> (ø)
src/common/src/event.rs	69.23% <100.00%> (+2.56%)	:arrow_up:
src/common/src/kafka.rs	90.38% <100.00%> (+0.18%)	:arrow_up:
src/stream/src/lib.rs	40.00% <100.00%> (+40.00%)	:arrow_up:
src/stream/src/v8_runtime.rs	76.55% <0.00%> (+0.68%)	:arrow_up:
... and 3 more

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