invoke-webrequest: add page (#8177)

* windows/get-*: Add PowerShell-only notice

* Update pages/windows/get-childitem.md

Co-authored-by: Axel Navarro <navarroaxel@gmail.com>

* windows/get-*: Change PowerShell notice

Co-authored-by: Axel Navarro <navarroaxel@gmail.com>

* invoke-item: Add command

* invoke-item: Remove quotations whenever possible

* invoke-item: Put all asterisk globs inside parameters

* invoke-item: More asterisk inside parameters

* Update pages/windows/invoke-item.md

Co-authored-by: Axel Navarro <navarroaxel@gmail.com>

* Update pages/windows/invoke-item.md

* invoke-webrequest: Add page with related aliases

* invoke-webrequest: Use LF instead of CRLF

* fix: Use -p parameter instead

Co-authored-by: Axel Navarro <navarroaxel@gmail.com>

pages/windows/wget.md

@@ -0,0 +1,15 @@
+# wget
+
+> In PowerShell, this command may be an alias of `Invoke-WebRequest` when the original `wget` program (<https://www.gnu.org/software/wget>) is not properly installed.
+
+- Check whether `wget` is properly installed by printing its version number. If this command evaluates into an error, PowerShell may have substituted this command with `Invoke-WebRequest`:
+
+`curl --version`
+
+- View documentation for the original `wget` command:
+
+`tldr wget -p common`
+
+- View documentation for PowerShell's `Invoke-WebRequest` command:
+
+`tldr invoke-webrequest`