Added skeleton code for docker build command

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This PR aims to add a skeleton code for docker build command.

Implements jf docker build and jf docker buildx build commands using the Strategy pattern to support different execution modes based on the JFROG_RUN_NATIVE environment variable.

changes:

1. New Strategy Pattern Implementation: Three strategies for Docker build execution: -> RunNativeStrategy: Direct Docker build execution (JFROG_RUN_NATIVE=true) -> BuildXStrategy: Docker buildx support (JFROG_RUN_NATIVE=true + buildx command) -> LegacyStrategy: Traditional JFrog approach (default)

depends on:

1. https://github.com/jfrog/jfrog-cli-artifactory/pull/283

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