Upgrade all manifests to v1 manifest format

manifests/p/Python/Python/3.7.7/Python.Python.yaml

@@ -0,0 +1,20 @@
+PackageIdentifier: Python.Python
+PackageVersion: 3.7.7
+PackageName: Python
+Publisher: Python
+PackageUrl: https://www.python.org
+License: PSF LICENSE AGREEMENT FOR PYTHON
+LicenseUrl: https://docs.python.org/3/license.html
+ShortDescription: Python is a programming language that lets you work more quickly and integrate your systems more effectively.
+Moniker: python
+Installers:
+- Architecture: x64
+  InstallerUrl: https://www.python.org/ftp/python/3.7.7/python-3.7.7-amd64.exe
+  InstallerType: exe
+  InstallerSha256: 1a0368663ceff999d865de955992b6ea3cb0c8cb15a1a296a8eb7df19cc59e69
+  InstallerSwitches:
+    Silent: /Quiet
+    SilentWithProgress: /Passive
+PackageLocale: en-US
+ManifestType: singleton
+ManifestVersion: 1.0.0