add PyPy to "py" launcher

pypy310_system.reg

Windows Registry Editor Version 5.00
; py -V:PyPy/3.10

[HKEY_LOCAL_MACHINE\SOFTWARE\Python\PyPy\3.10]
"SupportUrl"="https://www.pypy.org/"
"DisplayName"="PyPy3.10"
"SysVersion"="3.10"
"SysArchitecture"="64bit"
"Version"="7.3.15"

[HKEY_LOCAL_MACHINE\SOFTWARE\Python\PyPy\3.10\InstallPath]
@="C:\\Program Files\\PyPy310"
"ExecutablePath"="C:\\Program Files\\PyPy310\\pypy.exe"
"WindowedExecutablePath"="C:\\Program Files\\PyPy310\\pypyw.exe"

[HKEY_LOCAL_MACHINE\SOFTWARE\Python\PyPy\3.10\Idle]
@="C:\\Program Files\\PyPy310\\Lib\\idlelib\\idle.pyw"

pypy310_uninstall.reg

Windows Registry Editor Version 5.00
; Obviously, this only wipes the registry entry.
; You'll have to go actually delete the folder yourself.

[-HKEY_LOCAL_MACHINE\SOFTWARE\Python\PyPy\3.10]

[-HKEY_CURRENT_USER\SOFTWARE\Python\PyPy\3.10]

pypy310_user.reg

Windows Registry Editor Version 5.00
; py -V:PyPy/3.10

[HKEY_CURRENT_USER\SOFTWARE\Python\PyPy\3.10]
"SupportUrl"="https://www.pypy.org/"
"DisplayName"="PyPy3.10"
"SysVersion"="3.10"
"SysArchitecture"="64bit"
"Version"="7.3.15"

[HKEY_CURRENT_USER\SOFTWARE\Python\PyPy\3.10\InstallPath]
@="C:\\Wherever You Installed\\PyPy310"
"ExecutablePath"="C:\\Wherever You Installed\\PyPy310\\pypy.exe"
"WindowedExecutablePath"="C:\\Wherever You Installed\\PyPy310\\pypyw.exe"

[HKEY_CURRENT_USER\SOFTWARE\Python\PyPy\3.10\Idle]
@="C:\\Wherever You Installed\\PyPy310\\Lib\\idlelib\\idle.pyw"