Add cache for actors

[withinboredom]

Description

Adds a file cache for actors to reduce network requests while an actor is activated.

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to
implementation.

Please reference the issue this PR will close: #60

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[codecov-io]

Codecov Report

Merging #61 (807c851) into main (1c6c047) will increase coverage by 0.32%.
The diff coverage is 85.13%.

@@ Coverage Diff @@ ## main #61 +/- ## ============================================ + Coverage 73.23% 73.56% +0.32%  - Complexity 360 385 +25  ============================================ Files 45 47 +2 Lines 1349 1407 +58 ============================================ + Hits 988 1035 +47  - Misses 361 372 +11 

Impacted Files	Coverage Δ	Complexity Δ
src/config.php	100.00% <ø> (ø)	0.00 <0.00> (ø)
src/lib/Actors/Internal/Caches/NoCache.php	66.66% <66.66%> (ø)	5.00 <5.00> (?)
src/lib/Actors/ActorRuntime.php	95.95% <82.35%> (-2.84%)	31.00 <3.00> (+5.00)	⬇️
src/lib/Actors/ActorState.php	91.89% <87.50%> (-3.50%)	25.00 <0.00> (+2.00)	⬇️
src/lib/Actors/Internal/Caches/FileCache.php	88.88% <88.88%> (ø)	13.00 <13.00> (?)

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