Make daedalus_core installable so sibling consumers (Phase 8 V4L2
daemon, future libva-v4l2-request-fourier integration tests, etc.)
can `pkg_check_modules(DAEDALUS REQUIRED daedalus-fourier)` against
a system-installed copy.
Installs:
- lib/libdaedalus_core.a
- include/daedalus.h
- lib/pkgconfig/daedalus-fourier.pc
- share/daedalus-fourier/shaders/*.spv (only when
DAEDALUS_BUILD_VULKAN is ON; consumers using
daedalus_ctx_create_no_qpu() don't need them)
pkg-config surfaces the static-archive transitive deps via
Libs.private (-lpthread -ldl -lm) and Requires.private (vulkan),
so a consumer doing `pkg-config --static --libs daedalus-fourier`
gets the full link line. Non-static consumers (using the
no_qpu path) get just `-ldaedalus_core`.
No behaviour change to existing tests / benches.
Verified on hertz (Pi 5, dev host): clean build, all 7 SPIR-V
shaders + the static lib + the header + the .pc file land in
the install prefix.
claude-noether