Add helpers folder and add script for running C/C++ quickly (#241)

helpers/README.md

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+# Helpers
+
+Commands to make your life easier.
+
+## How to use
+
+Execute following snippet at any time to be able to run the commands in the scripts:
+
+```zsh
+source './path/to/script.nu'
+```
+
+With `./path/to/...` being the path to the script you want to utilize.

helpers/run-c-cpp.nu

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+# Runs C code via GCC without leaving a file behind
+def rcc [ 
+  file: path # The file to run
+] {
+  # Remove exe if still exists
+  rm $"($file).exe" --permanent --force
+  # Compile code to exe
+  ^gcc ("." | path join $file | path expand) -o ("." | path join $"($file).exe" | path expand)
+  # Execute exe
+  ^$"($file).exe"
+  # Remove exe
+  rm $"($file).exe" --permanent --force
+}
+
+# Runs C++ code via g++ without leaving a file behind
+def r++ [
+  file: path # The file to run 
+] {
+  # Remove exe if still exists
+  rm $"($file).exe" --permanent --force
+  # Compile code to exe
+  ^g++ ("." | path join $file | path expand) -o ("." | path join $"($file).exe" | path expand)
+  # Execute exe
+  ^$"($file).exe"
+  # Remove exe
+  rm $"($file).exe" --permanent --force
+}