The container environment's $DOCKER_FINANCE_CONTAINER_CONF is
bind-mounted and, by default, points to ~/.config/docker-finance.d
The parent dir (~/.config) is subsequently owned by root (Docker-ism).
Ergo, with visidata v3.2, visidata cannot create its default dir:
"PermissionError: [Errno 13] Permission denied: for visidata config"
This commit fixes that by setting visidata's default dir to use the
calling profile's docker-finance.d (where profile customization occurs).
Also included is some related refactoring.
As said before; `lib_ledger` was meant to be a general abstraction to
any underlying CLI ledger.
But, between C++ `ledger` and Ledger Hardware Wallet, this abstraction
has become too confusing and counterproductive.
Since `hledger` will be the underlying implementation for the forseeable
future, all doubt should now be removed.
Since modules are included upon build type, if a build doesn't support
a feature then that feature's dependencies will not be available.
This commit will give notice of those missing dependencies.
