Update Motoko templates for new mops build-based recipe

[marc0olo]

Background

The Motoko recipe in icp-cli-recipes is being rewritten to delegate compilation to mops build instead of invoking moc directly (see dfinity/icp-cli-recipes#26). This aligns Motoko with how the Rust recipe delegates to cargo build.

The new recipe uses {{_.canister.name}} (injected automatically by icp-cli via dfinity/icp-cli#567) to match against the [canisters] key in mops.toml — no extra recipe configuration: params needed.

Required changes

Tracked and implemented in #28. Three templates need updating once both blocking PRs are merged.

What moves to mops.toml

Before (icp.yaml / canister.yaml)	After (mops.toml)
main: src/main.mo	[canisters.backend] main = "src/main.mo"
candid: backend.did	[canisters.backend] candid = "backend.did"
args: --incremental-gc	[canisters.backend] args = ["--incremental-gc"]

Blocked on

• feat!: rewrite Motoko recipe to delegate compilation to mops build icp-cli-recipes#26 — new Motoko recipe using mops build
• feat: inject _.canister.name into recipe template context icp-cli#567 — {{_.canister.name}} built-in variable