feat: avoid duplicated symbol declarations

[stephanniewerth]

If you have the same named classes in different namespaces, there will be duplicated symbol declarations in the generated php files.

namespace Foo;

# [...]
use Foo\Bar\SomeThing; # Duplicated symbol declaration

class SomeThing extends ClassStructure  # Duplicated symbol declaration
{
    /** @var SomeThing[]|array */
    public $elements;

    # [...]
}

This throws the following exception:

PHP Fatal error: Cannot declare class Foo\SomeThing because the name is already in use ...

With this pull request the fully qualified name of the class will be added to the PhpNamespace object of each added class to the PhpApp object. The output will be the following:

namespace Foo;

# [...]
use Foo\Bar\Something as SomeThing1;

class SomeThing extends ClassStructure
{
    /** @var SomeThing1[]|array */
    public $elements;

    # [...]
}

[codecov]

Codecov Report

Merging #33 into master will increase coverage by 0.15%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master      #33      +/-   ##
============================================
+ Coverage     89.43%   89.58%   +0.15%     
  Complexity      517      517              
============================================
  Files            38       38              
  Lines          1363     1364       +1     
============================================
+ Hits           1219     1222       +3     
+ Misses          144      142       -2     

Impacted Files	Coverage Δ	Complexity Δ
src/App/PhpApp.php	72.22% <100.00%> (+0.79%)	11.00 <0.00> (ø)
src/PhpNamespaces.php	95.45% <0.00%> (+4.54%)	17.00% <0.00%> (ø%)

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[vearutop]

Thank you, v0.2.27 tagged.