Fix name collision in maximum_clique

[timholy]

Graphs v1.14.0 started exporting maximum_clique, which is a function that MolecularGraph also exports. The two names collide, which causes problems for MolecularGraph's test suite.

This "fixes" the problem by merging the two functions, having MolecularGraph add new methods to the Graphs function. Currently, this PR should be viewed as a "trial balloon" because there is a major problem: solving the problem this way is piracy. There are several alternatives, including (1) renaming MolecularGraph's function to something else, (2) scoping calls to MolecularGraph.maximum_clique in the test suite, or (3) defining a new function in MolecularGraph that calls Graphs' function and then does some post-processing. Let me know your preferred solution and I can implement it.

Because this was introducing piracy, I also took the liberty of adding Aqua tests. Currently this highlights quite a few failures (not just the piracy I introduced), so I marked the test as broken. Fixing these should be the subject of a future PR.

[timholy]

This ended up being trickier than expected because this package still supports Julia 1.9, but Graphs no longer does, so maximum_clique may or may not be defined by Graphs depending on the Julia version. But this version finally passes tests.

Again, I'm happy to make revisions when you let me know how you'd like to handle the piracy issue.

[mojaie]

I'm sorry for the late response.
The minimum version will be bumped up to the latest LTS release v1.10.11 (March 9, 2026).

This package has some common graph algorithms that should be implemented in Graphs.jl as menthoned on #128. But there should be some specific algorithms for molecular mining tasks. In the case of maximum_clique, Graphs.jl implementation seems not support lazy enumeration of cliques and timeouts that are essential for practical use.

My simple idea is to rename conflicting functions in this package (as you mentioned as (1)).
Looking ahead, I think it would be a good idea to establish a naming convention for functions with the same name as those in Graphs.jl that clearly indicates they have been intentionally implemented to handle molecular mining tasks (e.g. maximum_clique_mg).

By just adding aliases as like

maximum_clique_mg = MolecularGraph.maximum_clique

[timholy]

Sorry for the delay in getting back to this. I've adopted the maximum_clique_mg naming and updated the PR.