feat: all chains and all channels query

[joemonem]

Motivation

Users couldn't query all chains nor all channels

Implementation

• Added all chains and all channels queries

Testing

None

Version Changes

• kernel: 1.2.5-b.3 -> 1.2.5-b.4

Checklist

• Versions bumped correctly and documented
• Changelog entry added or label applied

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✨ Finishing touches

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch kernel-channel-chain-queries

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[SlayerAnsh]

Having 1 query that returns chain and associated channels (both ics20 and direct) would be better. In this approach client won't have sufficient info to map channels to chains

[SlayerAnsh]

This looks good, we need another query that takes chain are argument and returns its channel details (both ics20 and direct). If its not present then it will error with Chain Not Found

[joemonem]

This is already covered by the ChannelInfo query, i'll adjust it to return an error if it's not found instead of a None value