Refactoring: Simplify OpenCryptoFile

Walkthrough

The recent changes include significant modifications across several classes to enhance functionality and simplify management of file channels. Key updates involve replacing specific listener implementations with more generic Runnable interfaces, introducing a new ChunkIO dependency for improved chunk management, and streamlining the code by removing unnecessary parameters and data structures. These adjustments aim to boost performance and clarity while ensuring robust handling of file operations.

Changes

Files	Change Summary
`src/main/java/org/cryptomator/cryptofs/ch/ChannelComponent.java`, `src/main/java/org/cryptomator/cryptofs/ch/CleartextFileChannel.java`, `src/test/java/org/cryptomator/cryptofs/ch/CleartextFileChannelTest.java`	Updated method signatures to replace `ChannelCloseListener` with `Runnable`, enhancing flexibility in channel closure handling. Introduced `ChunkIO` for better chunk management.
`src/main/java/org/cryptomator/cryptofs/fh/ChunkIO.java`	Changed visibility of `ChunkIO` class from package-private to public, improving accessibility across packages.
`src/main/java/org/cryptomator/cryptofs/fh/OpenCryptoFile.java`, `src/test/java/org/cryptomator/cryptofs/fh/OpenCryptoFileTest.java`	Removed `ChunkIO` dependencies from constructors, simplifying channel management. Updated tests accordingly.

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant ChannelComponent
    participant CleartextFileChannel
    participant ChunkIO

    Client->>ChannelComponent: create(ciphertextChannel, options, closeListener)
    ChannelComponent->>CleartextFileChannel: new CleartextFileChannel(ciphertextChannel, chunkIO, ...)
    CleartextFileChannel->>ChunkIO: registerChannel(ciphertextChannel)
    Client->>CleartextFileChannel: close()
    CleartextFileChannel->>ChunkIO: unregisterChannel(ciphertextChannel)

🐇 In a world of code, so bright and keen,
New channels manage, with grace unseen.
Runnables dance, and chunks align,
Data flows smoothly—oh, how divine!
With each little change, we hop with glee,
A brighter tomorrow for you and me! 🌟

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cryptomator / cryptofs