[#1] feat: use globs and paths with folders to list multiple files

[Angelmmiguel]

Allow the CLI to receive files, globs and folders and iterate the different paths. This required to change the main structure from FileSize to vec<FileSize>. This will allow future improvements such as sorting and top.

> cargo run -- "./"
DISK    BYTES   PATH
364K    56K     .git
4K      263B    .github
4K      131B    .gitignore
8K      6K      Cargo.lock
4K      333B    Cargo.toml
12K     11K     LICENSE
4K      41B     README.md
12K     3K      src
106M    104M    target

> cargo run -- "."
DISK    BYTES   PATH
106M    104M    .

Closes #1