Add Windows PowerShell dev workflow

scripts/push.ps1

@@ -0,0 +1,31 @@
+param(
+    [string]$Remote = "origin",
+    [string]$Branch = "",
+    [switch]$SetUpstream
+)
+
+Set-StrictMode -Version Latest
+$ErrorActionPreference = "Stop"
+
+. (Join-Path $PSScriptRoot "dev-tools.ps1")
+
+Use-LocalTooling
+$credential = Import-GitCredential
+if (-not $Branch) {
+    $Branch = (& git branch --show-current).Trim()
+}
+if (-not $Branch) {
+    throw "현재 브랜치를 찾지 못했습니다."
+}
+
+$pair = "{0}:{1}" -f $credential.Username, $credential.Password
+$token = [Convert]::ToBase64String([Text.Encoding]::UTF8.GetBytes($pair))
+$gitArgs = @("-c", "http.extraheader=AUTHORIZATION: Basic $token", "push")
+if ($SetUpstream) {
+    $gitArgs += @("--set-upstream", $Remote, $Branch)
+} else {
+    $gitArgs += @($Remote, $Branch)
+}
+
+Write-Step "git push $Remote $Branch"
+& git @gitArgs