Set up publish-to-bcr (#230)

Author: illicitonion

.bcr/metadata.template.json

@@ -0,0 +1,25 @@
+{
+  "homepage": "https://github.com/bazel-contrib/rules_jvm",
+  "maintainers": [
+    {
+      "name": "Daniel Wagner-Hall",
+      "email": "dawagner@gmail.com",
+      "github": "illicitonion"
+    },
+    {
+      "name": "Gibson Fahnestock",
+      "email": "gibfahn@gmail.com",
+      "github": "gibfahn"
+    },
+    {
+      "name": "Simon Stewart",
+      "email": "simon.m.stewart@gmail.com",
+      "github": "shs96c"
+    }
+  ],
+  "repository": [
+    "github:bazel-contrib/rules_jvm"
+  ],
+  "versions": [],
+  "yanked_versions": {}
+}

.bcr/presubmit.yml

@@ -0,0 +1,10 @@
+# We should probably create a standalone test module, but for now we'll just run our in-repo tests.
+bcr_test_module:
+  matrix:
+    platform: ["debian10", "macos", "ubuntu2004", "windows"]
+  tasks:
+    run_tests:
+      name: "Run tests"
+      platform: ${{ platform }}
+      test_targets:
+        - "//..."

.bcr/source.template.json

@@ -0,0 +1,5 @@
+{
+  "integrity": "",
+  "strip_prefix": "{REPO}-{VERSION}",
+  "url": "https://github.com/{OWNER}/{REPO}/archive/refs/tags/{TAG}.tar.gz"
+}