Import the MetaMesh app family from Worph/AppStore

23 apps (MetaCore, the library/network/client tiers and 13 MetaFeeder*)
move out of the general-purpose Worph/AppStore into their own store so the
MetaMesh family releases on its own cadence.

- asset URLs repointed to cdn.jsdelivr.net/gh/Worph/MetaAppStore@main
- store scaffolding added (category/recommend/featured lists, licence,
  contributing, gitattributes)
- psd-source/meta-icons-v2 icon generator follows the apps

MetaMCP stays in Worph/AppStore: it is third-party metatool-ai software,
not part of MetaMesh.

README.md

@@ -1 +1,48 @@
-# MetaAppStore
+# MetaAppStore
+
+CasaOS / Yundera 3rd-party app store for the **MetaMesh** application family.
+
+Split out of [Worph/AppStore](https://github.com/Worph/AppStore) so the MetaMesh
+apps ship on their own release cadence, independent of the general-purpose app
+collection.
+
+## Adding the store
+
+In Yundera / CasaOS → App Store → *Add source*:
+
+```
+https://github.com/Worph/MetaAppStore/archive/refs/heads/main.zip
+```
+
+## What's in here
+
+| Tier | Apps |
+|------|------|
+| Core | `MetaCore` (leader election, Redis, WebDAV) |
+| Library | `MetaSort`, `MetaFuse`, `MetaStremio` |
+| Network | `MetaShare` (content transport), `MetaGateway`, `MetaGatewayShared` |
+| Clients | `MetaWatch`, `MetaWatchShared`, `MetaRead` |
+| Feeders | `MetaFeederAniList`, `MetaFeederArxiv`, `MetaFeederEuropePMC`, `MetaFeederGiphy`, `MetaFeederGutenberg`, `MetaFeederOpenSubtitles`, `MetaFeederProwlarr`, `MetaFeederSciHub`, `MetaFeederSuwayomi`, `MetaFeederTMDB`, `MetaFeederTribler`, `MetaFeederUsenet`, `MetaFeederWikiCommons` |
+
+`MetaCore` is the dependency of every other app — install it first.
+
+Some apps pair with non-Meta apps that remain in
+[Worph/AppStore](https://github.com/Worph/AppStore): **Suwayomi** (the chapter
+tier `MetaFeederSuwayomi` reads) and **SegmentPlayer**.
+
+## Assets
+
+Icons and screenshots are served from jsDelivr:
+
+```
+https://cdn.jsdelivr.net/gh/Worph/MetaAppStore@main/Apps/{AppName}/
+```
+
+`psd-source/meta-icons-v2/` holds the procedural icon generator for the family —
+see its README to regenerate an app icon.
+
+## Upstream source
+
+These compose files are the deployable face of the MetaMesh services built in
+[MetaMesh/meta-root-v2](https://github.com/worph). This repo is vendored there
+as the `packages/MetaAppStore` submodule.