Improve code API between the File model and collections

[caendesilva]

No description provided.

[codecov]

Codecov Report

Merging #657 (e5ab5fa) into master (3f6a605) will not change coverage.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##              master      #657   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
- Complexity      1030      1035    +5     
===========================================
  Files            130       130           
  Lines           2562      2567    +5     
===========================================
+ Hits            2562      2567    +5     

Impacted Files	Coverage Δ
...c/Foundation/Concerns/BaseFoundationCollection.php	100.00% <100.00%> (ø)
...ckages/framework/src/Foundation/FileCollection.php	100.00% <100.00%> (ø)
packages/framework/src/Support/Models/File.php	100.00% <100.00%> (ø)

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[what-the-diff]

• Added support for Arrayable in BaseFoundationCollection
• Changed the way source files are filtered to use a new method on File model instead of checking if belongsTo is null or not
• Added methods to check if file belongs to page, and whether it's a media file or not (source)