Switch to truAPI (retire the triangle-js-sdks host transport)

[UtkarshBhardwaj007]

Summary

Switch the Host API transport off triangle-js-sdks (the @novasamatech/host-api stack) and onto truAPI (@parity/truapi).

Background

The Host to product transport layer used to be provided by triangle-js-sdks, which publishes @novasamatech/host-api. That transport is being retired in favour of @parity/truapi. As of @parity/product-sdk-host@0.12.0 the host transport is @parity/truapi.

This repository is on a very old host stack: @parity/product-sdk-host@^0.8.0 and @parity/product-sdk-signer@^0.6.3. This is a large jump, so it should be handled carefully and likely alongside the broader product-sdk upgrade.

What needs to happen

• Bump @parity/product-sdk-host from 0.8.0 to a truAPI backed release (0.12.0 or later, latest is 0.14.1) and bring @parity/product-sdk-signer up in lockstep.
• Work through the breaking changes across the intermediate releases (host API surface, signer API, and the 0.18 Result error API that arrives with the wider upgrade).
• Confirm @parity/truapi resolves to a single instance in the tree.
• Re-run the tutorial quests end to end against the truAPI host.

Acceptance criteria

• Each quest that relies on the host connects and signs through truAPI.
• No @novasamatech/host-api transport dependency remains.
• The tutorial flow completes start to finish.

[illegalcall]

Can i get assigned to it @UtkarshBhardwaj007 ?