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Added 'get map' support to dump command #1216

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nitishmalang
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AddIng support for retrieving and displaying structured BPF map contents using the kmeshctl dump get map command.

Changes Introduced:
Introduced a new subcommand get map under kmeshctl dump to fetch and format BPF map data.
Parses raw uint32 and hexadecimal values into a structured JSON output.
Uses the existing port-forwarding logic to communicate with the Kmesh daemon.
Enhances debugging and observability for developers working with Kmesh BPF maps.

kmeshctl dump <kmesh-daemon-pod> get map

This will return a structured JSON representation of the BPF map contents, making it easier to understand and debug.

References:
Closes #1117
Discussion: Issue #1117

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[APPROVALNOTIFIER] This PR is NOT APPROVED

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Welcome @nitishmalang! It looks like this is your first PR to kmesh-net/kmesh 🎉

kmeshctl dump <kmesh-daemon-pod> kernel-native

# Dual Engine mode:
kmeshctl dump <kmesh-daemon-pod> dual-engine
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How about kmeshctl dump map?

I am thinking we should not require users to specify dual-engine or kernel-native, we can get it automatically

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What is the output look like, can you paste it here

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Kmeshctl support for structured bpftool dumped map content
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