Moving SAPI to standalone package

[msmakouz]

Q	A
Bugfix?	❌
Breaks BC?	✔️
New feature?	❌

[codecov]

Codecov Report

Merging #666 (c09eb03) into 3.0 (9976ff3) will increase coverage by 0.07%.
The diff coverage is 33.33%.

@@             Coverage Diff              @@
##                3.0     #666      +/-   ##
============================================
+ Coverage     81.95%   82.03%   +0.07%     
+ Complexity     5423     5399      -24     
============================================
  Files           609      607       -2     
  Lines         13624    13556      -68     
============================================
- Hits          11166    11120      -46     
+ Misses         2458     2436      -22     

Impacted Files	Coverage Δ
...work/Debug/StateCollector/EnvironmentCollector.php	0.00% <0.00%> (ø)
src/Framework/Bootloader/Http/HttpBootloader.php	100.00% <100.00%> (ø)

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[roxblnfk]

It need to remove this line from changelog:

- [spiral/http] Added return type `bool` to the method `emit` in `Spiral\Http\EmitterInterface` interface.