[buildx] add setup function

[buildx] fix docker buildcloud

[buildx] fix buildx plugin installation

[buildx] add build_cloud function

ci(buildx): update buildx.yml

fix(wiremock): change workdir

ci: publish wasm modules to ghcr.io

feat: add wasm plugin for flox

feat: add wasm plugin for flox

ci: set NIX_CONFIG extra-access-tokens for GitHub

update README.md