daedalus monorepo 1.2.0

First unified release of the consolidated monorepo: the daedalus agent
library, icarus CLI host, and monkeybyte GTK desktop host now share one
repository, one build system, and one version stream.

- Superbuild root CMakeLists.txt: one configure builds library + demos +
  tests + both hosts (DAEDALUS_BUILD_ICARUS / DAEDALUS_BUILD_MONKEYBYTE)
- Hosts are dual-mode: in-tree target linking or standalone FetchContent
- Unified versioning: bare x.y.z tags cover all components
- OmniNet declared once via daedalus/cmake/FetchOmniNet.cmake
- Root install.sh: one-pass install of both hosts + library
- Consolidated .gitignore and MIT LICENSE at the root