Add DocForge documentation site

docs/content/getting-started/01-install.md

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+# Install DocForge
+
+1. Clone or download this repository.
+2. Run `npm install` to install dependencies.
+3. Start the local development server:
+
+```bash
+npm run dev
+```
+
+The site will be available at `http://localhost:8080`.

docs/content/getting-started/02-build.md

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+# Build the Site
+
+When you're ready to generate the static files, run:
+
+```bash
+npm run build
+```
+
+The output appears in the `_site/` folder.

docs/content/getting-started/index.md

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+# Getting Started
+
+This section walks you through installing DocForge and creating your first site.