feat: cycle completions

[mdjohns]

resolves #8.
calling select_prev at the beginning of the completion list will now cycle to the end.
calling select_next at the end of the completion list will now cycle back to the beginning.

it may make sense to make this config-driven, let me know what you'd prefer!

[Saghen]

Thank you! I'd prefer config driven like windows.autocomplete.cycle = { from_bottom = true, from_top = true }

[shubham-cpp]

@mdjohns , could you also update the readme in this PR, because the username in readme to install the plugin is incorrect

{
  'saghen/blink.cmp', -- should be "Saghen/blink.cmp"
  lazy = false, -- lazy loading handled internally
  -- optional: provides snippets for the snippet source
  dependencies = 'rafamadriz/friendly-snippets',

  -- use a release tag to download pre-built binaries
  version = 'v0.*',
  -- OR build from source, requires nightly: https://rust-lang.github.io/rustup/concepts/channels.html#working-with-nightly-rust
  -- build = 'cargo build --release',

  opts = {
    highlight = {
      -- sets the fallback highlight groups to nvim-cmp's highlight groups
      -- useful for when your theme doesn't support blink.cmp
      -- will be removed in a future release, assuming themes add support
      use_nvim_cmp_as_default = true,
    },
    -- set to 'mono' for 'Nerd Font Mono' or 'normal' for 'Nerd Font'
    -- adjusts spacing to ensure icons are aligned
    nerd_font_variant = 'normal',
    
    -- experimental auto-brackets support
    -- accept = { auto_brackets = { enabled = true } }
    
    -- experimental signature help support
    -- trigger = { signature_help = { enabled = true } }
  }
}

[mdjohns]

@Saghen done! i also updated the readme to reflect the change.
let me know what you think!

[mdjohns]

@shubham-cpp these URLs aren't case sensitive: The lowercase URL works fine in my config.

[Saghen]

Thank you!