feat!(terminal): unify terminal window behavior and centralize sizing config (#102)

- add terminal.window.type support (hsplit, vsplit, floating, tab)
- add terminal.window.split_size for split-based layouts
- rename floating size options to terminal.window.floating_width/floating_height
- validate terminal window ratios during setup
- make terminal.run/run_floating merge default keymaps internally
- remove cmd.split width/height sizing in favor of terminal.window config
- improve floating/log buffer state handling and refresh behavior
- update README examples and configuration docs

BREAKING CHANGE: terminal sizing/config moved to terminal.window.*.
Removed cmd.split.width/cmd.split.height.
Renamed terminal.window.width/height to terminal.window.floating_width/floating_height

lua/jj/cmd/split.lua

@@ -3,21 +3,6 @@ local M = {}
 local utils = require("jj.utils")
 local terminal = require("jj.ui.terminal")
 
---- Clamps a ratio value between 0.1 and 1.0, returning a default of 1.0 if the input is invalid.
----@param value? number
----@param field string
----@return number
-local function clamp_ratio(value, field)
-	if type(value) ~= "number" or value < 0.1 or value > 1.0 then
-		utils.notify(
-			string.format("Value for field `%s` must be between `0.1` and `1.0`. Defaulted to `1.0`", field),
-			vim.log.levels.WARN
-		)
-		return 1.0
-	end
-	return value
-end
-
 local function build_split_command(opts)
 	local args = { "jj", "split" }
 
@@ -56,8 +41,6 @@ function M.split(opts)
 
 	local cmd_mod = require("jj.cmd")
 	opts = vim.tbl_deep_extend("force", cmd_mod.config.split or {}, opts or {}) --[[@as jj.cmd.split.opts]]
-	opts.height = clamp_ratio(opts.height, "height")
-	opts.width = clamp_ratio(opts.width, "width")
 
 	-- If it's empty do nothing
 	if utils.is_change_empty(opts.rev or "@") then
@@ -69,8 +52,6 @@ function M.split(opts)
 		terminal.run_floating(cmd, nil, {
 			title = " JJ Split ",
 			modifiable = true,
-			height = math.floor(vim.o.lines * opts.height),
-			width = math.floor(vim.o.columns * opts.width),
 			keep_modifiable = true,
 			interactive = true,
 			on_exit = opts.on_exit or nil,