Add configuration doc for vscode environment setup (#737)

CONTRIBUTING.md

@@ -59,6 +59,25 @@ request. This can be done through the GitHub website or the
 When submitting your pull request, please provide a brief description of the changes you've made and
 the issue or issues that your changes address.
 
+### Optional step for VS Code: Setting up environment
+
+1. Install the following extensions:
+
+* [rust-lang.rust-analyzer](https://marketplace.visualstudio.com/items?itemName=rust-lang.rust-analyzer)
+* [tamasfe.even-better-toml](https://marketplace.visualstudio.com/items?itemName=tamasfe.even-better-toml)
+* [serayuzgur.crates](https://marketplace.visualstudio.com/items?itemName=serayuzgur.crates)
+* [vadimcn.vscode-lldb](https://marketplace.visualstudio.com/items?itemName=vadimcn.vscode-lldb)
+
+2. Open `Command Palette` with Ctrl+Shift+P or F1 and type `LLDB: Generate Launch Configurations from Cargo.toml` then select it, this will generate a file that should be saved as `.vscode/launch.json`.
+
+3. Now you can enable breakpoint on code through IDE and then start debugging the library/binary you want, such as the following example:
+
+<div align="center">
+<img src="./assets/debug-options-vscode.png" width="700px"/>
+<div align="left">
+
+4. If you're creating a new library or binary, keep in mind to repeat the step 2 to always keep a fresh list of targets.
+
 ---
 
 We look forward to seeing your contributions to the Burn project. Happy coding!