chore: remove scripts folder, fix badge branches (master→main/dev)

- Removed scripts/ directory (setup_discord.py)
- Fixed badges: were pointing to 'master' (doesn't exist), now use 'main'
- Added separate badge rows for main and dev branches

Author: MDUYN

README.md

@@ -7,14 +7,24 @@
 </p>
 
 <h4 align="center">
-  <a href="https://github.com/coding-kitties/investing-algorithm-framework/actions/workflows/test.yml">
-    <img src="https://img.shields.io/github/actions/workflow/status/coding-kitties/investing-algorithm-framework/test.yml?branch=master&label=linux&style=flat-square&logo=linux&logoColor=white" alt="linux" style="height: 20px;">
+  <a href="https://github.com/coding-kitties/investing-algorithm-framework/actions/workflows/test.yml?query=branch%3Amain">
+    <img src="https://img.shields.io/github/actions/workflow/status/coding-kitties/investing-algorithm-framework/test.yml?branch=main&label=linux%20(main)&style=flat-square&logo=linux&logoColor=white" alt="linux main" style="height: 20px;">
   </a>
-  <a href="https://github.com/coding-kitties/investing-algorithm-framework/actions/workflows/test.yml">
-    <img src="https://img.shields.io/github/actions/workflow/status/coding-kitties/investing-algorithm-framework/test.yml?branch=master&label=macos&style=flat-square&logo=apple&logoColor=white" alt="macos" style="height: 20px;">
+  <a href="https://github.com/coding-kitties/investing-algorithm-framework/actions/workflows/test.yml?query=branch%3Amain">
+    <img src="https://img.shields.io/github/actions/workflow/status/coding-kitties/investing-algorithm-framework/test.yml?branch=main&label=macos%20(main)&style=flat-square&logo=apple&logoColor=white" alt="macos main" style="height: 20px;">
   </a>
-  <a href="https://github.com/coding-kitties/investing-algorithm-framework/actions/workflows/test.yml">
-    <img src="https://img.shields.io/github/actions/workflow/status/coding-kitties/investing-algorithm-framework/test.yml?branch=master&label=windows&style=flat-square&logo=windows&logoColor=white" alt="windows" style="height: 20px;">
+  <a href="https://github.com/coding-kitties/investing-algorithm-framework/actions/workflows/test.yml?query=branch%3Amain">
+    <img src="https://img.shields.io/github/actions/workflow/status/coding-kitties/investing-algorithm-framework/test.yml?branch=main&label=windows%20(main)&style=flat-square&logo=windows&logoColor=white" alt="windows main" style="height: 20px;">
+  </a>
+  <br>
+  <a href="https://github.com/coding-kitties/investing-algorithm-framework/actions/workflows/test.yml?query=branch%3Adev">
+    <img src="https://img.shields.io/github/actions/workflow/status/coding-kitties/investing-algorithm-framework/test.yml?branch=dev&label=linux%20(dev)&style=flat-square&logo=linux&logoColor=white" alt="linux dev" style="height: 20px;">
+  </a>
+  <a href="https://github.com/coding-kitties/investing-algorithm-framework/actions/workflows/test.yml?query=branch%3Adev">
+    <img src="https://img.shields.io/github/actions/workflow/status/coding-kitties/investing-algorithm-framework/test.yml?branch=dev&label=macos%20(dev)&style=flat-square&logo=apple&logoColor=white" alt="macos dev" style="height: 20px;">
+  </a>
+  <a href="https://github.com/coding-kitties/investing-algorithm-framework/actions/workflows/test.yml?query=branch%3Adev">
+    <img src="https://img.shields.io/github/actions/workflow/status/coding-kitties/investing-algorithm-framework/test.yml?branch=dev&label=windows%20(dev)&style=flat-square&logo=windows&logoColor=white" alt="windows dev" style="height: 20px;">
   </a>
   <a href="https://pypi.org/project/investing-algorithm-framework/">
     <img src="https://img.shields.io/pypi/v/investing-algorithm-framework.svg?style=flat-square" alt="pypi" style="height: 20px;">