[IBC] Implement an IBC light client Wasm implementation for the Pocket network

[h5law]

Objective

Implement an ICS-08 conforming IBC light client in Rust to track and verify the Pocket V1 network

Origin Document

Issue #912

Goals

• Create a WASM binary to be used in the ICS-08 implementation of ICS-02
• Fully satisfy the ICS-02 interface
• Allow for the passing of serialised data/payloads from the host into the WASM client
• Allow for values and results to be returned from the WASM client
• Add tests to cover the verification of Pocket network state, client updates, misbehaviour submissions, etc.

Deliverable

• A WASM binary that can be used in the ICS-08 implementation

Non-goals / Non-deliverables

• Change the ICS-02 interface
• Implement a CosmWasm Pocket light client for use in the Cosmos ecosystem

General issue deliverables

• Update the appropriate CHANGELOG(s)
• Update any relevant local/global README(s)
• Update relevant source code tree explanations
• Add or update any relevant or supporting mermaid diagrams

Testing Methodology

• Task specific tests or benchmarks: make ...
• New tests or benchmarks: make ...
• All tests: make test_all
• LocalNet: verify a LocalNet is still functioning correctly by following the instructions at docs/development/README.md
• k8s LocalNet: verify a k8s LocalNet is still functioning correctly by following the instructions here

---

Creator: @h5law
Co-Owners: @h5law