~/.aqlrc is just another aql script that can be loaded automatically
when the aql shell starts.

You can put standard aql commands inside the file.

It will be in $BUILD_DIR/install

We don't use it anymore.

Load the standard library files into Prompt.
The iteration order of the file list is unspecified[1] but I don't think
we have to deal with it anyhow. Even we create two files, say a.aql, and
b.aql and a function in b.aql uses a function from a.aql, the loading
order doesn't matter anyway.

Let's install the aql function files into DATADIR, which will probably
be /usr/share/algorithms-library/stdlib.

Let's start working on a standard library [1]. The idea is that we
bundle some aql files with predefined functions (and procedures) and we
load them when aql prompt starts.

So let's prepare a configuration file with a location for the scripts.
The location is currently only in local dev tree. We will later change
that to some /usr/share or /usr/lib location.

[1] #221

I have seen some students failing to understand the exception "Init on
RHS when generate eps". Let's make the error message more clear.

F36 is not released yet [1] and it contains not-yet-released g++-12
which causes some problems for our code. Let's deal with it once g++-12
is released.

[1] https://fedorapeople.org/groups/schedule/f-36/f-36-key-tasks.html

unique ptr is convertible to shared ptr natively. It makes sense to construct
unique_ptr first and convert it to shared_ptr if it is needed.

Most likely a remnant of abstraction refactoring to OperationAbstraction and
Value where Value is using the functionality, not the OperationAbstraction

prior to new normalization that needs to put code there