Rename the bridge to the forge service; this repository is the add-on

- bridge/ → forge/, module and binary ipcr-forge, image ghcr.io/yundera/ipcr-forge
  (was ipcr-forge-bridge); releases are plain vX.Y.Z tags (workflow image.yml)
- data folders $AppID/bridge/{state,secrets} → $AppID/forge/..., in-container /forge
- docs link to the engine (Yundera/ipcr) instead of relative paths; README

.github/workflows/image.yml

@@ -1,13 +1,14 @@
-name: bridge
+name: image
 
-# IPCR Forge's bridge image (bridge/): Gitea → Radicle mirror + the forge's page.
+# IPCR Forge's service image (forge/): Gitea → Radicle mirror, the forge's page and admin, the
+# staging gate. ghcr.io/yundera/ipcr-forge; a `vX.Y.Z` tag publishes X.Y.Z.
 on:
   push:
     branches: [main]
-    tags: ["bridge-v*"]
-    paths: ["bridge/**", ".github/workflows/bridge.yml"]
+    tags: ["v*"]
+    paths: ["forge/**", ".github/workflows/image.yml"]
   pull_request:
-    paths: ["bridge/**", ".github/workflows/bridge.yml"]
+    paths: ["forge/**", ".github/workflows/image.yml"]
   workflow_dispatch:
 
 permissions:
@@ -15,7 +16,7 @@ permissions:
   packages: write
 
 env:
-  IMAGE: ghcr.io/yundera/ipcr-forge-bridge
+  IMAGE: ghcr.io/yundera/ipcr-forge
 
 jobs:
   vet:
@@ -24,9 +25,9 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version-file: bridge/go.mod
+          go-version-file: forge/go.mod
       - run: test -z "$(gofmt -l .)" && go vet ./... && go test ./...
-        working-directory: bridge
+        working-directory: forge
 
   image:
     needs: vet
@@ -45,17 +46,17 @@ jobs:
         with:
           images: ${{ env.IMAGE }}
           tags: |
-            type=match,pattern=bridge-v(.*),group=1
+            type=semver,pattern={{version}}
             type=ref,event=branch
             type=sha
       # amd64 only: the Radicle CLI is fetched as its x86_64 release, and the Forge listing is
       # amd64 only.
       - uses: docker/build-push-action@v6
         with:
-          context: bridge
+          context: forge
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           build-args: VERSION=${{ steps.meta.outputs.version }}
-          cache-from: type=gha,scope=bridge
-          cache-to: type=gha,mode=max,scope=bridge
+          cache-from: type=gha,scope=forge
+          cache-to: type=gha,mode=max,scope=forge