Adds riscv64 to build pipelines so CodeWhale ships prebuilt binaries
and npm wrappers for 64-bit RISC-V Linux (glibc) systems.
Changes:
**CI / build**
- release.yml: +2 build matrix entries (codewhale + codewhale-tui for
riscv64gc-unknown-linux-gnu), cross-compilation toolchain step using
a dedicated DEB822-format apt source for ports.ubuntu.com, bundle
step, and release-notes table row.
- nightly.yml: +2 matrix entries, matching cross-compilation setup.
- resolve job: handle workflow_dispatch when the target tag does not
yet exist (fall back to HEAD SHA).
**Packaging**
- npm/codewhale/scripts/artifacts.js: add riscv64 to ASSET_MATRIX
under linux so npm install -g codewhale resolves on RISC-V.
**Docs**
- docs/INSTALL.md: add riscv64 row to supported platforms table;
replace with clearer 'other architectures' wording.
Build strategy: cross-compile from ubuntu-latest (x86_64) using
gcc-riscv64-linux-gnu. The dbus runtime dependency (from the keyring
crate's secret-service backend) is satisfied via ports.ubuntu.com.
PKG_CONFIG_ALLOW_CROSS and a cross-target libdir are set so the
keyring crate finds dbus-1 during cross-compilation.
Docker support for linux/riscv64 is intentionally not added here:
GitHub Actions does not yet provide the infrastructure to build or
emulate riscv64 containers. The Dockerfile changes will follow when
the hosted CI surface supports it.
Rocky Zhang
c0dd43993c