Add dependency check and remove unnecesary dependencies from the documentation

Author: eritiro

README.md

@@ -37,8 +37,6 @@ A lightweight **ReaScript + ReaImGui** tool that turns REAPER into a pattern
 
 1. **Dependencies**  
    * REAPER 7+ (tested on v7.39)  
-   * [SWS Extension](https://www.sws-extension.org/)  
-   * [js_ReaScriptAPI](https://forum.cockos.com/showthread.php?t=212174)  
    * [ReaImGui ≥ 0.9.3.3](https://github.com/cfillion/reaimgui)
 
 

brute-seq.lua

@@ -35,6 +35,15 @@ local reaper = reaper
 script_path = debug.getinfo(1, "S").source:match [[^@?(.*[\/])[^\/]-$]]
 local modules_path = script_path .. 'Modules/'
 
+-- check dependencies 
+
+if not reaper.APIExists('ImGui_GetVersion') then
+    local text = 'This script requires the ReaImGui extension to run. You can install it through ReaPack.'
+    reaper.ShowMessageBox(text, 'Error - Missing Dependency', 0)
+    return
+end
+
+
 -- requires script_path
 dofile(script_path .. 'Modules/GUI.lua')
 -- requires time_resolution