Both static and dynamic versions of the libraries are provided and they can be used internally for `termux-core` executables/libraries, and also for other packages. Various standardized and safe utils are provided, the primary ones are listed below.
- Added logger framework with multiple log levels that supports writing logs to standard streams and to a file, or a custom implementation. The log level can be read from an environment variable by calling `getLogLevelFromEnv()` which maps to `(OFF=0, NORMAL=1, DEBUG=2, VERBOSE=3, VVERBOSE=4 and VVVERBOSE=5)`. The default value is `1`.
- Added various file utils including normalize and absolutize path functions from `portal-io` library and AOSP that has been tested on hundreds of test cases.
- Add Termux shell environment headers for Unix/Android/Termux variable names, and for reading Termux scoped environment variable values with a fallback for build time values, like for `TERMUX_APP__DATA_DIR`, `TERMUX__ROOTFS`, `TERMUX__PREFIX`, etc.

In future, tests should be moved to each package's own repo which are currently implemented here.