Implement IBucket.open() method for Java lib

[asuiu]

Develop an open() method within the BucketBase class that returns a stream-like object, replicating core functionality of Java's InputStream and OutputStream for interacting with objects in a bucket-based storage system.

Functional Requirements:

• Object Access: The method must accept a parameter that uniquely identifies the object within the bucket (e.g., object key or path).
• Modes: Implement support for both read and write modes, returning appropriate stream objects.
• Stream-Like Objects:
  • Read Mode: Return an InputStream or a derived class that supports read(), read(byte[]), skip(), and close() methods.
  • Write Mode: Return an OutputStream or a derived class that supports write(int), write(byte[]), flush(), and close() methods. skip() is not supported in write mode.
• Binary and Text Modes: Support both binary and text modes, handling encoding/decoding as necessary using appropriate Reader/Writer classes.
• Buffered Operations: Implement buffered read/write operations for efficiency, utilizing flush() to commit writes.
• Error Handling: Implement appropriate error handling for scenarios such as:
  • Object not found.
  • Insufficient permissions.
  • Invalid mode.
  • Connection errors.

Acceptance Criteria:

• The open() method must return appropriate stream objects for read and write modes.
• Appropriate exceptions must be thrown for error conditions.
• The code must follow Java coding conventions and best practices.

[SergiuSuiu]

add seek()