Add PowerShell script with Git functions

rc.ps1

@@ -0,0 +1,51 @@
+function postpr {
+    # Save current branch
+    $current_branch = git symbolic-ref --short HEAD
+
+    if ($current_branch -eq "master") {
+        Write-Host "You are already on master!"
+        return
+    }
+
+    # Switch to master
+    git checkout master
+    if ($LASTEXITCODE -ne 0) { return }
+
+    # Pull latest changes
+    git pull origin master
+    if ($LASTEXITCODE -ne 0) { return }
+
+    # Delete previous branch locally
+    git branch -d $current_branch
+    if ($LASTEXITCODE -ne 0) {
+        Write-Host "Failed to delete branch $current_branch. Maybe unmerged changes?"
+    }
+
+    Write-Host "Switched to master, pulled latest, and deleted branch $current_branch"
+}
+
+function gpr {
+    param($branch)
+
+    git checkout -b $branch
+    if ($LASTEXITCODE -ne 0) { return }
+
+    git push origin $branch
+    if ($LASTEXITCODE -ne 0) { return }
+
+    git checkout master
+    git branch -D $branch
+}
+
+function gc {
+    param([string]$msg)
+    git commit -am "$msg"
+}
+
+function ga {
+    git add -A
+}
+
+function gp {
+    git pull
+}