fix(mode): incompatible with vim.v.count

doc/libmodal.txt

@@ -161,6 +161,9 @@ FUNCTIONS                                               *libmodal-usage-function
 			  that |getchar()| completes. The user input is received through
 			  `g:{name}ModeInput` (see above).
 
+			- |v:count| and |v:count1| are provided through `g:{name}ModeCount`
+			  and `g:{name}ModeCount1` respectively.
+
 			*Error	you cannot pass a funcref to Lua from Vimscript!
 			      	- If you want to use a |funcref()| for {instruction}, it
 			      	  must be the name of the function as a `string`. >

lua/libmodal/Mode.lua

@@ -7,6 +7,9 @@ local utils = require 'libmodal.utils' --- @type libmodal.utils
 --- @field private global_exit libmodal.utils.Vars
 --- @field private global_input libmodal.utils.Vars
 --- @field private help? libmodal.utils.Help
+--- @field private input libmodal.utils.Vars
+--- @field private count libmodal.utils.Vars
+--- @field private count1 libmodal.utils.Vars
 --- @field private input_bytes? number[]
 --- @field private instruction fun()|{[string]: fun()|string}
 --- @field private local_exit boolean
@@ -27,6 +30,12 @@ local TIMEOUT =
 }
 TIMEOUT.CHAR_NUMBER = TIMEOUT.CHAR:byte()
 
+--- Byte for 0
+local ZERO = string.byte(0)
+
+--- Byte for 9
+local NINE = string.byte(9)
+
 --- execute the `instruction`.
 --- @private
 --- @param instruction fun(libmodal.Mode)|string a Lua function or Vimscript command.
@@ -38,6 +47,8 @@ function Mode:execute_instruction(instruction)
 		vim.api.nvim_command(instruction)
 	end
 
+	self.count:set(0)
+	self.count1:set(1)
 	self:redraw_virtual_cursor()
 end
 
@@ -104,6 +115,9 @@ function Mode:enter()
 		self.popups:push(utils.Popup.new())
 	end
 
+	self.count:set(0)
+	self.count1:set(1)
+
 	self.local_exit = false
 
 	--- HACK: https://github.com/neovim/neovim/issues/20793
@@ -173,6 +187,13 @@ function Mode:get_user_input()
 	-- set the global input variable to the new input.
 	self.global_input:set(user_input)
 
+	if ZERO <= user_input and user_input <= NINE then
+		local oldCount = self.count:get()
+		local newCount = tonumber(oldCount .. string.char(user_input))
+		self.count:set(newCount)
+		self.count1:set(math.max(1, newCount))
+	end
+
 	if not self.supress_exit and user_input == globals.ESC_NR then -- the user wants to exit.
 		return false -- as in, "I don't want to continue."
 	else -- the user wants to continue.
@@ -256,6 +277,8 @@ function Mode.new(name, instruction, supress_exit)
 	-- inherit the metatable.
 	local self = setmetatable(
 		{
+			count = utils.Vars.new('count', name),
+			count1 = utils.Vars.new('count1', name),
 			global_exit = utils.Vars.new('exit', name),
 			global_input = utils.Vars.new('input', name),
 			instruction = instruction,