Added arguments (#182)

• Add support for dynamic arguments in dialogs via dialog.open(player, args)
• Arguments can be referenced in dialog content using {arg:0}, {arg:1}, etc.
• Arguments work in title, body text, input labels/placeholders, button labels/tooltips, and clipboard actions
• Updated /dialog open command to accept optional arguments
• Updated open_dialog action and FancyNpcs integration to support arguments

Added requirements (#201)

Created a new configuration option to Buttons & Inputs (Checkbox, Select, Textfield) to have a requirement for it to appear in a dialog. Currently these requirements are permission or string match - being

requirements: {
  "type": "permission",
  "permission": "my.permission"
}

or

requirements: {
  "type": "stringMatch",
  "input": "%player_name%",
  "output": "mesemi"
}

resulting in the item displaying if conditions are met (perm is held, or %player_name% resolves to mesemi)

Exit actions, widths and columns (#204)

• Added width for buttons, selects and textfields
• Added columns for dialogs (for dialogs that match multi_action, a "column" parameter can be used to change columns)
• Added exitAction for multi_action dialogs (basically a footer button with custom action, but mainly for close buttons)

Thank you to WiFlow and mesemi for their contributions to these features!