chore(gravity): configure rust toolchain

[AugustDG]

Summary

• Add Rust to the repo-level mise-compatible .tool-versions file.
• Remove the duplicate Gravity workflow Rust setup step so CI uses the repo toolchain configuration.
• Bump @bpinternal/gravity to 0.1.1.

Validation

• git diff --check
• pnpm check in gravity
• pnpm test in gravity
• pnpm build in gravity

[greptile-apps]

Greptile Summary

This PR configures a Rust toolchain entry in the repo-level .tool-versions file for local mise/asdf users, removes the explicit dtolnay/rust-toolchain@stable CI step from the Gravity workflow, and bumps @bpinternal/gravity to 0.1.1.

• .tool-versions gains rust stable for local developer toolchain management via mise/asdf.
• The Gravity CI workflow drops the dtolnay/rust-toolchain@stable step (which also installed the wasm32-unknown-unknown WASM target) but does not add a step to install tools from .tool-versions; no other workflow in the repo uses mise/asdf in CI.
• gravity/package.json is bumped from 0.1.0 to 0.1.1.

Confidence Score: 4/5

The change is mostly safe — the ubuntu-latest runner ships Rust stable and wasm-pack auto-installs the WASM target — but CI is no longer explicitly pinning the Rust toolchain and the .tool-versions file has no effect there.

The workflow removes the only explicit Rust setup step without adding a mechanism to read .tool-versions in CI. The build will likely continue to pass today because the runner image bundles Rust and wasm-pack can add the WASM target on its own, but the Rust version in CI is now implicit and unpinned, creating a quiet divergence between local and CI environments that could surface unexpectedly.

.github/workflows/gravity.yml deserves a second look — a jdx/mise-action step (or restoring dtolnay/rust-toolchain) should be added so CI actually honours the toolchain file.

Important Files Changed

Filename	Overview
.github/workflows/gravity.yml	Removes the explicit dtolnay/rust-toolchain@stable step (including the wasm32-unknown-unknown target) without adding a step to consume .tool-versions; CI now relies on the runner's pre-installed Rust with no version pin.
.tool-versions	Adds rust stable for local mise/asdf toolchain management; correct addition for developer environments but has no effect on CI without a corresponding workflow step.
gravity/package.json	Bumps version from 0.1.0 to 0.1.1; straightforward patch-level version bump with no other changes.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[gravity.yml trigger] --> B[checkout]
    B --> C[pnpm setup]
    C --> D[node setup]
    D --> E{Rust setup}
    E -->|Before PR| F[dtolnay rust-toolchain stable\nwasm32-unknown-unknown target installed]
    E -->|After PR| G[No step - relies on\nubuntu-latest pre-installed Rust]
    F --> H[pnpm install and build]
    G --> H
    H --> I[wasm-pack build]
    I -->|Before PR| J[Target ready]
    I -->|After PR| K[wasm-pack auto-installs target implicitly]

    subgraph dotfile [.tool-versions]
      L[rust stable]
    end
    dotfile -.->|never read by CI - no mise step| A

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flowchart TD
    A[gravity.yml trigger] --> B[checkout]
    B --> C[pnpm setup]
    C --> D[node setup]
    D --> E{Rust setup}
    E -->|Before PR| F[dtolnay rust-toolchain stable\nwasm32-unknown-unknown target installed]
    E -->|After PR| G[No step - relies on\nubuntu-latest pre-installed Rust]
    F --> H[pnpm install and build]
    G --> H
    H --> I[wasm-pack build]
    I -->|Before PR| J[Target ready]
    I -->|After PR| K[wasm-pack auto-installs target implicitly]

    subgraph dotfile [.tool-versions]
      L[rust stable]
    end
    dotfile -.->|never read by CI - no mise step| A

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