chore: add anemoi logos

logos/README.md

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+# Anemoi logos
+
+This directory contains the Anemoi logo in three variants:
+
+| File | Description |
+| --- | --- |
+| [`logo-only.svg`](logo-only.svg) | The logo mark on its own. |
+| [`logo-text-below.svg`](logo-text-below.svg) | The logo mark with the "Anemoi" wordmark below it. |
+| [`logo-text-right.svg`](logo-text-right.svg) | The logo mark with the "Anemoi" wordmark to its right. |
+
+<p align="center">
+  <img src="logo-only.svg" alt="Logo only" height="160">
+  &nbsp;&nbsp;&nbsp;
+  <img src="logo-text-below.svg" alt="Logo with text below" height="160">
+  &nbsp;&nbsp;&nbsp;
+  <img src="logo-text-right.svg" alt="Logo with text on the right" height="160">
+</p>
+
+## About SVG
+
+The logos are provided as **SVG** (Scalable Vector Graphics). SVG is a vector
+graphics format: instead of storing a fixed grid of pixels, it describes the
+image as shapes (paths, curves, fills). This means it can be **scaled to any
+size without losing quality** — there is no blur or pixelation, whether you
+display it as a tiny favicon or blow it up to cover a poster.
+
+For most uses (websites, documents, presentations) you can use the SVG files
+directly. If you need a raster image — for example a **PNG** for a tool that
+does not support SVG — you can generate one at whatever resolution you need
+using the instructions below.
+
+## Creating PNGs from the SVGs
+
+Because SVG is scalable, you choose the output resolution when you convert.
+The examples below render `logo-only.svg` to a PNG that is 1024 pixels wide;
+adjust the filename and size to taste.
+
+### Linux
+
+Most distributions ship with one of these tools (install via your package
+manager, e.g. `apt install inkscape librsvg2-bin imagemagick`).
+
+Using **rsvg-convert** (from `librsvg`):
+
+```bash
+rsvg-convert -w 1024 logo-only.svg -o logo-only.png
+```
+
+Using **Inkscape**:
+
+```bash
+inkscape logo-only.svg --export-type=png --export-width=1024 --export-filename=logo-only.png
+```
+
+Using **ImageMagick**:
+
+```bash
+convert -background none -resize 1024x logo-only.svg logo-only.png
+```
+
+### macOS
+
+Install a tool with [Homebrew](https://brew.sh), then convert.
+
+Using **rsvg-convert**:
+
+```bash
+brew install librsvg
+rsvg-convert -w 1024 logo-only.svg -o logo-only.png
+```
+
+Using **Inkscape**:
+
+```bash
+brew install --cask inkscape
+inkscape logo-only.svg --export-type=png --export-width=1024 --export-filename=logo-only.png
+```
+
+The built-in `qlmanage -t` and `sips` tools can also rasterise SVGs, but they
+do not let you set an arbitrary resolution as reliably, so the tools above are
+recommended.
+
+### Windows
+
+Using **Inkscape** (download from [inkscape.org](https://inkscape.org), then
+run in PowerShell or Command Prompt):
+
+```powershell
+inkscape logo-only.svg --export-type=png --export-width=1024 --export-filename=logo-only.png
+```
+
+Using **ImageMagick** (download from
+[imagemagick.org](https://imagemagick.org)):
+
+```powershell
+magick -background none -resize 1024x logo-only.svg logo-only.png
+```
+
+Alternatively, open the SVG in any modern web browser (Chrome, Edge, Firefox)
+and use a browser extension or an online converter to export it as PNG.
+
+### Transparent background
+
+The logos have no background, so the PNGs are transparent by default with
+`rsvg-convert` and Inkscape. With ImageMagick, pass `-background none` (shown
+above) to preserve transparency instead of getting a white background.