refactor(plugin): split mpv plugin into modules and trim startup overhead

plugin/subminer/main.lua

@@ -0,0 +1,25 @@
+local mp = require("mp")
+
+local function current_script_dir()
+	if type(mp.get_script_directory) == "function" then
+		local from_mpv = mp.get_script_directory()
+		if type(from_mpv) == "string" and from_mpv ~= "" then
+			return from_mpv
+		end
+	end
+
+	local source = debug.getinfo(1, "S").source or ""
+	if source:sub(1, 1) == "@" then
+		local full = source:sub(2)
+		return full:match("^(.*)[/\\][^/\\]+$") or "."
+	end
+	return "."
+end
+
+local script_dir = current_script_dir()
+local module_patterns = script_dir .. "/?.lua;" .. script_dir .. "/?/init.lua;"
+if not package.path:find(module_patterns, 1, true) then
+	package.path = module_patterns .. package.path
+end
+
+require("init").init()