Add Omarchy integration: theme catalog hot-reload + OSC52 clipboard

Intrepid now installs Omarchy's full colorscheme catalog and hot-reloads
by reading the theme spec omarchy-theme-set writes to
~/.local/state/omarchy/current/theme/neovim.lua, watched via vim.uv
(no lazy.nvim here, so this replicates its file-watch + reload behavior
directly). Other hosts are unaffected.

Also ports Omarchy's OSC52 remote-clipboard module so yanks still reach
the local Wayland clipboard/tmux/SSH client, matching the default
Omarchy nvim config's behavior in those sessions.

lua/remote_clipboard.lua

@@ -0,0 +1,100 @@
+-- Clipboard for sessions whose yanks may need to reach another machine:
+-- every copy is emitted as OSC 52 (inside tmux this becomes a tmux buffer,
+-- rebroadcast to every attached client, local or SSH). Paste prefers the
+-- local Wayland clipboard when one is available, so content copied in other
+-- apps remains pasteable; without a display, paste is an OSC 52 query that
+-- tmux (or the terminal) answers.
+--
+-- Ported from Omarchy's default nvim config (config/remote_clipboard.lua) so
+-- this config keeps working over SSH/tmux the same way Omarchy's does.
+local M = {}
+
+local function proc_lines(pid, file)
+	local ok, lines = pcall(vim.fn.readfile, "/proc/" .. pid .. "/" .. file)
+	return ok and lines or {}
+end
+
+local function proc_ppid(pid)
+	for _, line in ipairs(proc_lines(pid, "status")) do
+		local ppid = line:match("^PPid:%s+(%d+)")
+		if ppid then
+			return tonumber(ppid)
+		end
+	end
+end
+
+local function ancestor_process_named(name)
+	local pid = vim.fn.getpid()
+
+	for _ = 1, 16 do
+		local ppid = proc_ppid(pid)
+		if not ppid or ppid <= 1 then
+			return false
+		end
+
+		local comm = proc_lines(ppid, "comm")[1] or ""
+		if comm:find(name, 1, true) then
+			return true
+		end
+
+		pid = ppid
+	end
+
+	return false
+end
+
+function M.setup()
+	local in_tmux = vim.env.TMUX ~= nil
+	local in_ssh = vim.env.SSH_TTY ~= nil or vim.env.SSH_CONNECTION ~= nil
+	local in_herdr = vim.env.HERDR_PANE_ID ~= nil or ancestor_process_named("herdr")
+
+	if not (in_tmux or in_ssh or in_herdr) then
+		return
+	end
+
+	local osc52 = require("vim.ui.clipboard.osc52")
+	local has_wayland = vim.env.WAYLAND_DISPLAY ~= nil
+		and vim.fn.executable("wl-copy") == 1
+		and vim.fn.executable("wl-paste") == 1
+
+	local function copy(register)
+		local emit = osc52.copy(register)
+
+		return function(lines)
+			if has_wayland then
+				local cmd = { "wl-copy", "--sensitive", "--type", "text/plain" }
+				if register == "*" then
+					cmd[#cmd + 1] = "--primary"
+				end
+				vim.fn.system(cmd, lines)
+			end
+
+			emit(lines)
+		end
+	end
+
+	local function paste(register)
+		if not has_wayland then
+			return osc52.paste(register)
+		end
+
+		return function()
+			local cmd = { "wl-paste", "--no-newline" }
+			if register == "*" then
+				cmd[#cmd + 1] = "--primary"
+			end
+
+			local lines = vim.fn.systemlist(cmd, "", 1)
+			return vim.v.shell_error == 0 and lines or {}
+		end
+	end
+
+	vim.g.clipboard = {
+		name = "RemoteClipboard",
+		copy = { ["+"] = copy("+"), ["*"] = copy("*") },
+		paste = { ["+"] = paste("+"), ["*"] = paste("*") },
+		cache_enabled = 0,
+	}
+end
+
+return M