db: Add ResultSetWrapper type

[zach2good]

I affirm:

• I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
• I understand I should leave resolving conversations to the LandSandBoat team so that reviewers won't miss what was said.
• I have read and understood the Contributing Guide and the Code of Conduct.
• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

Changes syntax from:

    auto zoneId = rset->getUInt("pos_zone");

to

    auto zoneId = rset->get<uint16>("pos_zone");

Related issues:
#4577
#6355

[zach2good]

While I'm here I'm also going to convert the SQL queries in charutils to be preparedstmts: #4577

[zach2good]

For my own peace of mind, I'm probably also going to add a test executable that communicates with a temporary test database, and writes/reads things into the db and confirms they've made it back OK.

I can also do comparative testing with the current db stuff. Once everything is confirmed, I can push harder to replace the existing system.

TODO:

• String escaping
• Validation/reconnection/pinging
• Charset stuff
• Keepalive settings
• Encoding

    std::string GetDatabaseName();
    std::string GetClientVersion();
    std::string GetServerVersion();

• Query helpers with fmt and sprintf built in
• autocommit
• transaction stuff
• profiling tools

[zach2good]

Even if I'm considering moving to a different SQL connector lib in the future, this is still useful as a layer of abstraction on top so the main code only changes once and I can futz with the underlying driver code