feat: adding query method to paq

[saccarosium]

Related to: #164

This little new method let's query paq's registry of packages to let the user have custom functionality like notify if the are packages to install at startup.

Example

Notify user when there are new packages to install.

vim.api.nvim_create_autocmd("VimEnter", {
    once = true,
    callback = function() 
            local pkgs_count = #require("paq").query("to_install")
            if pkgs_count < 1 then return end
        print(string.format("There are %d to install", pkgs_count))
    end
})

You can even setup automatic packages installation at startup.

vim.api.nvim_create_autocmd("VimEnter", {
    once = true,
    callback = function() 
            local pkgs_count = #require("paq").query("to_install")
            if pkgs_count < 1 then return end
            require("paq").install()
    end
})

[saccarosium]

I've made the changes.

I think we might also revamp the docs to provide a cookbook with some o the ways you could use paq to achieve some of the behaviors that other package managers has. But in another commit.

[savq]

I think we might also revamp the docs to provide a cookbook with some o the ways you could use paq to achieve some of the behaviors that other package managers has. But in another commit.

Yeah, there's a little bit of that in the misc section of the docs. We can add more info there.

There's never too much documentation 🤓