feat: add UniqueId page and database property

[mariosimao]

Closes #256

[codecov]

Codecov Report

Merging #268 (4468631) into main (c3187b7) will not change coverage.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               main     #268   +/-   ##
=========================================
  Coverage     99.19%   99.19%           
  Complexity     1334     1334           
=========================================
  Files           158      158           
  Lines          4341     4341           
=========================================
  Hits           4306     4306           
  Misses           35       35           

Files Changed	Coverage Δ
src/Databases/Properties/PropertyCollection.php	98.23% <100.00%> (ø)
src/Databases/Properties/PropertyFactory.php	100.00% <100.00%> (ø)
src/Pages/Properties/PropertyCollection.php	100.00% <100.00%> (ø)
src/Pages/Properties/PropertyFactory.php	100.00% <100.00%> (ø)

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