feat(natives): added native addon distribution and platform validation to CLI update mechanism

- Added native addon distribution and installation support to the CLI update mechanism, enabling platform-specific native modules to be downloaded and installed alongside the main binary.
- Added platform validation in native addon loader to verify supported platforms (linux-x64, linux-arm64, darwin-x64, darwin-arm64, win32-x64) with helpful error messages for unsupported configurations.
- Enhanced native addon loading error messages to provide platform-specific troubleshooting guidance for both npm/bun installations and local development environments.
- Updated installation scripts (install.sh, install.ps1) to download and install native addon files alongside the main binary during CLI installation.

scripts/install-tests/source.dockerfile

@@ -1,18 +1,23 @@
 # Test --source install from local repo
 FROM debian:bookworm-slim
 
-RUN apt-get update && apt-get install -y curl ca-certificates unzip && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y curl ca-certificates unzip build-essential && rm -rf /var/lib/apt/lists/*
 
 # Install bun
 RUN curl -fsSL https://bun.sh/install | bash
 ENV PATH="/root/.bun/bin:$PATH"
 
+# Install Rust (needed to build native addon)
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain nightly
+ENV PATH="/root/.cargo/bin:$PATH"
+
 # Copy local repo
 WORKDIR /repo
 COPY . .
 
-# Install dependencies and link globally
+# Install dependencies, build native addon, and link globally
 RUN bun install --frozen-lockfile
+RUN bun --cwd=packages/natives run build:native
 RUN cd packages/coding-agent && bun link
 
 # Verify