refactor: 💥 Handled model option by context in Policies

[allysonsilva]

• When passing the --model options together with the --context option then the use statement in the policy must follow the context namespace, not the laravel pattern.
• When not using the --context option, only the --model option, the model must be created in the default Laravel folder

closes #5

[codecov-commenter]

Codecov Report

Merging #6 (ee72cf1) into 2.x (793ce53) will not change coverage. The diff coverage is 100.00%.

@@             Coverage Diff             @@
##                 2.x        #6   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
- Complexity       186       191    +5     
===========================================
  Files             40        40           
  Lines            538       552   +14     
===========================================
+ Hits             538       552   +14     

Flag	Coverage Δ
tests	100.00% <100.00%> (ø)

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Impacted Files	Coverage Δ
src/Commands/Foundation/Concerns/BuildClass.php	100.00% <100.00%> (ø)
src/Commands/Foundation/PolicyMakeCommand.php	100.00% <100.00%> (ø)