Add script to update esptool (#112)

***NO_CI***

Author: josesimoes

update-esptool.ps1

@@ -0,0 +1,62 @@
+# Copyright (c) .NET Foundation and Contributors
+# See LICENSE file in the project root for full license information.
+
+# this PS1 downloads the latest version of the esptool from their github repo, unpacks it
+
+# get details about latest version
+$lastRelease = $(gh release list --limit 1 --repo espressif/esptool)
+
+# grab version
+$version = $lastRelease.Split()[3]
+
+# make sure security doesn't block our request
+[Net.ServicePointManager]::SecurityProtocol = "tls12, tls11"
+
+#############
+# WIN version
+$urlWin = "https://github.com/espressif/esptool/releases/download/$version/esptool-$version-win64.zip"
+$outputWin = "$env:TEMP\esptool-$version-win64.zip"
+
+"Downloading esptool for Windows..." | Write-Host -ForegroundColor White -NoNewline
+(New-Object Net.WebClient).DownloadFile($urlWin, $outputWin)
+"OK" | Write-Host -ForegroundColor Green
+
+#############
+# MAC version
+$urlMac = "https://github.com/espressif/esptool/releases/download/$version/esptool-$version-macos.zip"
+$outputMac = "$env:TEMP\esptool-$version-macos.zip"
+
+"Downloading esptool for MAC..." | Write-Host -ForegroundColor White -NoNewline
+(New-Object Net.WebClient).DownloadFile($urlMac, $outputMac)
+"OK" | Write-Host -ForegroundColor Green
+
+###############
+# Linux version
+$urlLinux = "https://github.com/espressif/esptool/releases/download/$version/esptool-$version-linux-amd64.zip"
+$outputLinux = "$env:TEMP\esptool-$version-linux-amd64.zip"
+
+"Downloading esptool for Linux..." | Write-Host -ForegroundColor White -NoNewline
+(New-Object Net.WebClient).DownloadFile($urlLinux, $outputLinux)
+"OK" | Write-Host -ForegroundColor Green
+
+# unzip files
+"Unzip files..." | Write-Host -ForegroundColor White -NoNewline
+Expand-Archive $outputWin -DestinationPath $env:TEMP -Force > $null
+Expand-Archive $outputMac -DestinationPath $env:TEMP  -Force > $null
+Expand-Archive $outputLinux -DestinationPath $env:TEMP  -Force > $null
+"OK" | Write-Host -ForegroundColor Green
+
+# copy files to the correct locations
+"Copying files to tools folders..." | Write-Host -ForegroundColor White -NoNewline
+Move-Item -Path (Join-Path -Path $env:TEMP -ChildPath "esptool-$version-win64\**" -Resolve) -Destination (Join-Path -Path $PSScriptRoot -ChildPath "lib\esptool\esptoolWin" -Resolve)
+Move-Item -Path (Join-Path -Path $env:TEMP -ChildPath "esptool-$version-macos\**" -Resolve) -Destination (Join-Path -Path $PSScriptRoot -ChildPath "lib\esptool\esptoolMac" -Resolve)
+Move-Item -Path (Join-Path -Path $env:TEMP -ChildPath "esptool-$version-linux-amd64\**" -Resolve) -Destination (Join-Path -Path $PSScriptRoot -ChildPath "lib\esptool\esptoolLinux" -Resolve)
+"OK" | Write-Host -ForegroundColor Green
+
+# cleanup files
+Remove-Item -Path (Join-Path -Path $PSScriptRoot -ChildPath "lib\esptool\esptoolWin\LICENSE" -Resolve) -Force
+Remove-Item -Path (Join-Path -Path $PSScriptRoot -ChildPath "lib\esptool\esptoolWin\README.md" -Resolve) -Force
+Remove-Item -Path (Join-Path -Path $PSScriptRoot -ChildPath "lib\esptool\esptoolMac\LICENSE" -Resolve) -Force
+Remove-Item -Path (Join-Path -Path $PSScriptRoot -ChildPath "lib\esptool\esptoolMac\README.md" -Resolve) -Force
+Remove-Item -Path (Join-Path -Path $PSScriptRoot -ChildPath "lib\esptool\esptoolLinux\LICENSE" -Resolve) -Force
+Remove-Item -Path (Join-Path -Path $PSScriptRoot -ChildPath "lib\esptool\esptoolLinux\README.md" -Resolve) -Force