feat: Add runtime classes for FileReader/FileWriter instrumentation

[romtsn]

📜 Description

• Added SentryFileReader implementation for FileReader instrumentation
• Added SentryFileWriter implementation for FileWriter instrumentation

💡 Motivation and Context

This is a supporting PR with runtime classes for File I/O instrumentation s

💚 How did you test it?

📝 Checklist

• I reviewed the submitted code
• I added tests to verify the changes
• I updated the docs if needed
• No breaking changes

🔮 Next steps

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against bf506e5

[codecov-commenter]

Codecov Report

Merging #1843 (94b2ba8) into main (4c1cf85) will decrease coverage by 0.13%.
The diff coverage is 20.00%.

❗ Current head 94b2ba8 differs from pull request most recent head bf506e5. Consider uploading reports for the commit bf506e5 to get more accurate results

@@             Coverage Diff              @@
##               main    #1843      +/-   ##
============================================
- Coverage     75.61%   75.47%   -0.14%     
- Complexity     2237     2239       +2     
============================================
  Files           223      225       +2     
  Lines          7969     7989      +20     
  Branches        846      846              
============================================
+ Hits           6026     6030       +4     
- Misses         1533     1549      +16     
  Partials        410      410              

Impacted Files	Coverage Δ
.../sentry/instrumentation/file/SentryFileWriter.java	16.66% <16.66%> (ø)
.../sentry/instrumentation/file/SentryFileReader.java	25.00% <25.00%> (ø)

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