* All features related to POSIX environments (env vars, shell stuff) gated by feature flags
* Dependencies optional per feature flags
* new CI target for non-POSIX build
* new CI target for release binary artifact
Signed-off-by: Ava Hahn [ava@sunnypup.io](mailto:ava@sunnypup.io)
* env prints variables and functions in seperate columns
* run/stl seperation of concerns significantly better
* def doesnt store lists or lambdas in the environment
* Background task implementation
* Foreground an existing task implementation
* Documentation for both
* Refactors to signal handling, process pre-exec
* Fix up project structures
* combine vars and funcs table
* make a place for old code that may be useful to reference
* singleton pattern for sym table
Commentary:
When this change is finally finished I promise to use feature branches
from here on out
