feat: migrate to unified Meson build system#1

superstructor wants to merge 1 commit intowasmdiscere-os/gdk-pixbuf.wasm:wasmfrom

claude/migrate-meson-wasm-build-01YWkjg2Mc2TDABbySUGcR7Kdiscere-os/gdk-pixbuf.wasm:claude/migrate-meson-wasm-build-01YWkjg2Mc2TDABbySUGcR7KCopy head branch name to clipboard