Add Generate Starter Reason Projects as a reasonml til

reason/generate-starter-reason-projects.md

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+# Generate Starter Reason Projects
+
+With the latest `bs-platform` installed, you should have access to the `bsb`
+command which contains a number of options -- including `-themes`.
+
+```bash
+$ bsb -themes
+Available themes:
+basic
+basic-reason
+generator
+minimal
+node
+react
+```
+
+This is a list of themes (read: templates) that can be used to generate a
+starter project.
+
+For example, if you'd like a basic project structure geared toward writing
+Reason, run the following:
+
+```bash
+$ bsb -init my-project -theme basic-reason
+```
+
+Or if you'd like to get started with
+[`reason-react`](https://reasonml.github.io/reason-react/), give this a try:
+
+```bash
+$ bsb -init my-reason-react-project -theme react
+```
+
+[source](https://bucklescript.github.io/docs/en/new-project.html)