Ignore hidden directories by default within the glob pattern

[ryanluker]

Description

Based on a suggestion here https://github.com/ryanluker/vscode-coverage-gutters/issues/228#issuecomment-2185276726 around ignoring hidden directories / folders by default.

Work

• [ ] Ignore hidden folders by default (.venv, .git, etc)
• [ ] Add test to confirm default glob ignores folders properly.

[ryanluker]

Tried the easiest option https://github.com/ryanluker/vscode-coverage-gutters/pull/445/commits/d66d8d7d0eeb408a222fb33a78c366720f10808f but I think we need to go the more advance route of writing custom ignore functions (similar to what I posted here https://github.com/ryanluker/vscode-coverage-gutters/issues/228#issuecomment-2226993189). Definitely requires new test coverage though and not just a one line change sadly 😅.