pulumi-new: add page (tldr-pages#14833)

Co-authored-by: Juri Dispan <juri.dispan@posteo.net>
Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
Co-authored-by: Wiktor Perskawiec <git@spageektti.cc>

pages/common/pulumi-new.md

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+# pulumi new
+
+> Create a new Pulumi project.
+> More information: <https://www.pulumi.com/docs/iac/cli/commands/pulumi_new/>.
+
+- Choose a template interactively:
+
+`pulumi new`
+
+- Create a project from a specific template (e.g `azure-python`):
+
+`pulumi new {{provided-template}}`
+
+- Create a project from a local file:
+
+`pulumi new {{path/to/templates/aws-typescript}}`
+
+- Create a project from a Git repository:
+
+`pulumi new {{url}}`
+
+- Use the specified secrets provider with the <pulumi.com> backend:
+
+`pulumi new --secrets-provider={{passphrase}}`