with conda (de)activation- scripts, to pick the actual var values.

when it is overridden by `git config vars set PATH`
since this command is run BEFORE env has been activated,
and the PATH is still the pre-activation one.

* feat: put our path 1st in env PYTHON/PATHs.

so as to reload terminal-session with all RC-files updated,
before creating conda-env
(eg `~/.condarc` to speedup things).

put conda_init last, the lat one to execute on the 1st run.

read https://setuptools.pypa.io/en/latest/userguide/declarative_config.html#using-a-src-layout

don't erase its old value.

and avoid SLOW conda-forge!

to RUN FASTER (conda takes 10 ' to solve & install its env!!),
and to facilitate devs not to fiddle with conda package,
always choose pip.

as instructed by BDAP docs, to avoid default location,
which by default is user's home rc-folder.

fix(make): create intermediate dummy rule.

running command does not even detect conda installed.

* enh: finalize Setup scripts & Instructions.
* feat: setup-account.sh --help.
* refact: print actions if no args given.
* enh: slicence makefile execs.

not to be confused with `setup.py`,
and to prepare for `setup-project.sh`

- refact: rename `secrets.py` --> mysecrets.py`
- refact: add more, rename & homogenize dir vars with bash ones.
- FEAT: +`setup.cfg` +`pyproject.toml` to package lib-code.
- feat: add project coordinates in new package(`__init__.py`).
- feat: +`LICENSE.txt` of EUPL v1.2

Rational: refactored as package not to pollute/hide standard-lib modules,
and, through being pip-installable, to facilitate running scripts from dirs anywhere.