feat: generic types for DI classes

[max-s-lab]

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	❌
Fixed issues

Recently I was trying to increase PHPStan level in a Yii2 based project and came across some errors due to Instance and Container classes. When I checked the repository I saw that Container class was recently updated but it seems to have some errors. I would like to fix them. I also want to add some new annotations to Instance::ensure

Example

Before changes

After changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.85%. Comparing base (7037fd4) to head (56cbd05).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master   #20354   +/-   ##
=========================================
  Coverage     64.85%   64.85%           
  Complexity    11445    11445           
=========================================
  Files           431      431           
  Lines         37208    37208           
=========================================
  Hits          24132    24132           
  Misses        13076    13076           

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[samdark]

Thank you!