Introduce dm-framework.mk providing reusable build macros for packages
that integrate with the DM Framework:
- Build/Compile/DM: Generates C code and shared libraries from JSON data
models using json2code.js, compiles them, and creates package-specific
.so files
- Build/Install/DM: Installs generated libraries, JS handlers,
and data model files to the dm-framework directory(dmf)
Also adds bridgemngr as the first package utilizing these helpers to
implement bridge data model with dm-framework, which can be enabled
through flag CONFIG_BRIDGEMNGR_USE_DM_FRAMEWORK.
The commit also include changes in bbfdm dm-framework adaption.
