Updated build process, workflow, and build directions in README

Build.ps1

@@ -0,0 +1,33 @@
+# Build.ps1 for NUSGet
+
+# Default option is to run build, like a Makefile
+param(
+    [string]$Task = "build"
+)
+
+$buildNUSGet = {
+    Write-Host "Building NUSGet..."
+    python build_translations.py
+    python -m nuitka --show-progress --assume-yes-for-downloads NUSGet.py
+}
+
+$cleanNUSGet = {
+    Write-Host "Cleaning..."
+    Remove-Item -Recurse -Force NUSGet.exe, ./NUSGet.build/, ./NUSGet.dist/, ./NUSGet.onefile-build/
+}
+
+switch ($Task.ToLower()) {
+    "build" {
+        & $buildNUSGet
+        break
+    }
+    "clean" {
+        & $cleanNUSGet
+        break
+    }
+    default {
+        Write-Host "Unknown task: $Task" -ForegroundColor Red
+        Write-Host "Available tasks: build, clean"
+        break
+    }
+}