feat(diff): Add the diff_history command (#97)

This new command is natively implemented by both the `codediff` and `diffview` backends allowing to easily navigate the changes between two revsets while diffing the. 

It also gives a new `:J diff_hisotyr` command that optionally takes a range of revsets formatted `<rev1>..<rev2>` otherwise it prompts the user for the range.

lua/jj/cmd/init.lua

@@ -55,6 +55,7 @@ local split_module = require("jj.cmd.split")
 --- @field summary? string|string[]
 --- @field summary_tooltip? jj.cmd.summary_tooltip.keymaps
 --- @field tag_set? string|string[]
+--- @field history? string|string[]
 
 --- @class jj.cmd.rebase.keymaps
 --- @field onto? string|string[]
@@ -130,6 +131,10 @@ local split_module = require("jj.cmd.split")
 --- @class jj.cmd.fetch_pr_opts
 --- @field limit? number Limit the number of PRs to select from
 
+--- @class jj.cmd.diff_history_opts
+--- @field left? string The left revision for the range
+--- @field right? string The right revision for the range
+
 --- @type jj.cmd.opts
 M.config = {
 	describe = {
@@ -193,6 +198,7 @@ M.config = {
 			},
 			split = "<C-s>",
 			tag_set = "<S-t>",
+			history = "<S-h>",
 		},
 		status = {
 			open_file = "<CR>",
@@ -421,6 +427,34 @@ function M.diff(opts)
 	end
 end
 
+-- Diff history between two revisions
+--- @param opts? jj.cmd.diff_history_opts
+function M.diff_history(opts)
+	if not utils.ensure_jj() then
+		return
+	end
+
+	local diff_module = require("jj.diff")
+
+	if opts then
+		return diff_module.diff_history_revisions({ left = opts.left, right = opts.right })
+	end
+
+	-- Otherwise prompt the user for input
+	vim.ui.input({ prompt = "Range to diff with history" }, function(choice)
+		if choice then
+			local range = parser.parse_diff_range(choice)
+			if range then
+				diff_module.diff_history_revisions({ left = range.left, right = range.right })
+			else
+				utils.notify("Invalid range format. Use `left..right` or `left...right`.", vim.log.levels.ERROR)
+			end
+		else
+			terminal.close_terminal_buffer()
+		end
+	end)
+end
+
 -- Jujutsu rebase
 function M.rebase()
 	if not utils.ensure_jj() then
@@ -1188,6 +1222,20 @@ function M.j(args)
 		diff = function()
 			M.diff({ current = false })
 		end,
+		diff_history = function()
+			if remaining_args_str == "" then
+				return M.diff_history()
+			end
+
+			-- Otherwise it means a range has been provided
+			local parts = parser.parse_diff_range(remaining_args_str)
+			if not parts then
+				utils.notify("Invalid history range. Formant must be `<left>..<right>`", vim.log.levels.ERROR)
+				return
+			end
+
+			M.diff_history({ left = parts.left, right = parts.right })
+		end,
 		status = function()
 			M.status()
 		end,
@@ -1286,6 +1334,7 @@ function M.register_command()
 				"bookmark",
 				"describe",
 				"diff",
+				"diff_history",
 				"edit",
 				"fetch",
 				"git",