fix: update Gitea org references from mosaic/ to mosaicstack/

- Update all package.json repo URLs (mosaic/mosaic-stack → mosaicstack/mosaic-stack)
- Update npm registry URLs (/api/packages/mosaic/npm → /api/packages/mosaicstack/npm)
- Update woodpecker publish destinations
- Update tools/install.sh registry and repo base URLs

tools/install.sh

@@ -6,10 +6,10 @@
 #   2. @mosaicstack/mosaic (npm) → ~/.npm-global/     (CLI, TUI, gateway client, wizard)
 #
 # Remote install (recommended):
-#   bash <(curl -fsSL https://git.mosaicstack.dev/mosaic/mosaic-stack/raw/branch/main/tools/install.sh)
+#   bash <(curl -fsSL https://git.mosaicstack.dev/mosaicstack/mosaic-stack/raw/branch/main/tools/install.sh)
 #
 # Remote install (alternative — use -s -- to pass flags):
-#   curl -fsSL https://git.mosaicstack.dev/mosaic/mosaic-stack/raw/branch/main/tools/install.sh | bash -s --
+#   curl -fsSL https://git.mosaicstack.dev/mosaicstack/mosaic-stack/raw/branch/main/tools/install.sh | bash -s --
 #
 # Flags:
 #   --check         Version check only, no install
@@ -50,11 +50,11 @@ done
 
 # ─── constants ────────────────────────────────────────────────────────────────
 MOSAIC_HOME="${MOSAIC_HOME:-$HOME/.config/mosaic}"
-REGISTRY="${MOSAIC_REGISTRY:-https://git.mosaicstack.dev/api/packages/mosaic/npm/}"
+REGISTRY="${MOSAIC_REGISTRY:-https://git.mosaicstack.dev/api/packages/mosaicstack/npm/}"
 SCOPE="${MOSAIC_SCOPE:-@mosaicstack}"
 PREFIX="${MOSAIC_PREFIX:-$HOME/.npm-global}"
 CLI_PKG="${SCOPE}/mosaic"
-REPO_BASE="https://git.mosaicstack.dev/mosaic/mosaic-stack"
+REPO_BASE="https://git.mosaicstack.dev/mosaicstack/mosaic-stack"
 ARCHIVE_URL="${REPO_BASE}/archive/${GIT_REF}.tar.gz"
 
 # ─── colours ──────────────────────────────────────────────────────────────────