CLI: search should match non-exactly

[csadorf]

As suggested by @mbercx the aiidalab search function is currently matching only exact app names by default which is likely too restrictive. As a possible improvement, we could

• match search terms with wildcards, e.g., foo would match as *foo* with the current behavior.
• Use "fuzzy" matches, e.g., via the Levenshtein Distance
• Not only search the name, but also other metadata, e.g., the app description.

[mbercx]

Regarding the 3rd suggestion, brew has a --desc option for this. Not sure if we want to do this by default, but perhaps, considering the fact that we don't have that many apps yet. E.g. let's say we rename quantum-espresso to qe. I would still prefer that aiidalab search espresso would still return the qe app.