Add: Community showcase for "Turtle's Alternate Icons"

docs/community/turtle-alternate-icons/index.md

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+---
+search:
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+title: Turtle's Alternate Icons
+type: resource
+description: Alternate item icon set
+maintainer:
+  name: SentientTurtle
+  github: sentientturtle
+---
+
+# Turtle's Alternate Icons
+
+A set of alternate item & ship icons, fixing various issues with the official [Image Service](../../services/image-server/index.md).
+
+Status of those problems is tracked on the ['esi-issues' issue-tracker.](https://github.com/esi/esi-issues/issues/1448) If the issue has been resolved (closed), consider using the official Image Service.  
+[![](https://img.shields.io/github/issues/detail/state/esi/esi-issues/1448)](https://github.com/esi/esi-issues/issues/1448)
+
+<div class="grid cards" markdown>
+
+- [:octicons-download-16: __Download__](https://github.com/SentientTurtle/EVE-TurtleTools/releases){ .esi-card-link }
+- [:octicons-mark-github-16: __GitHub__](https://github.com/SentientTurtle/EVE-TurtleTools){ .esi-card-link }
+
+</div>
+
+## Features
+
+* All 'static' icons for items (Icons in 64x64 pixel PNG format, and 512x512 pixel ship/structure/etc 'renders' as JPG)
+    * Character Avatars, Corporation Logos, and Alliance Logos change dynamically. The Image Service must be used for those.
+    * Fixes for broken icons
+    * Support for SKIN icons
+* Two format options:
+    * Easy to use format matching the (deprecated) 'Image Export Collection'
+        * Single zip file with image files for all types; `[TYPE_ID]_64.png` & (where applicable) `[TYPE_ID]_512.jpg`
+    * Compact 'Service Bundle' with de-duplicated icons & JSON metadata
+* Bonus options:
+    * Old style 'glossy' overlays
+    * Extra overlays for Alpha-Clone or Omega-Clone requirements
+    * Extra overlays for module slots (As shown in the in-game market browser)
+* Automatic updates via GitHub Releases
+
+![Feature preview displaying features listed above.](turtlealticons-preview.png)
+