feat: add Protobuf language

.github/workflows/ci.yml

@@ -517,7 +517,7 @@ jobs:
           path: dist/plugins
           retention-days: "7"
   build-plugins-pine: 
-    name: "Plugins (pine): capnp, dart, devicetree, rescript, solidity, starlark, swift, textproto, thrift, uiua, wit, yuri"
+    name: "Plugins (pine): capnp, dart, devicetree, proto, rescript, solidity, starlark, swift, textproto, thrift, uiua, wit, yuri"
     runs-on: depot-ubuntu-24.04-32
     container: "ghcr.io/bearcove/arborium-plugin-builder:latest"
     needs: 
@@ -535,10 +535,10 @@ jobs:
           set -e
           tar -xf generate-output.tar && rm generate-output.tar
         shell: bash
-      - name: Build capnp, dart, devicetree, rescript, solidity, starlark, swift, textproto, thrift, uiua, wit, yuri
+      - name: Build capnp, dart, devicetree, proto, rescript, solidity, starlark, swift, textproto, thrift, uiua, wit, yuri
         run: |-
           set -e
-          ./xtask/target/release/xtask build capnp dart devicetree rescript solidity starlark swift textproto thrift uiua wit yuri -o dist/plugins
+          ./xtask/target/release/xtask build capnp dart devicetree proto rescript solidity starlark swift textproto thrift uiua wit yuri -o dist/plugins
         shell: bash
       - name: Upload plugins artifact
         uses: actions/upload-artifact@v4

demo/samples/proto.proto

@@ -0,0 +1,33 @@
+syntax = "proto3";
+package tutorial;
+
+import "google/protobuf/timestamp.proto";
+
+option go_package = "github.com/protocolbuffers/protobuf/examples/go/tutorialpb";
+
+message Person {
+  string name = 1;
+  int32 id = 2; // Unique ID number for this person.
+  string email = 3;
+
+  message PhoneNumber {
+    string number = 1;
+    PhoneType type = 2;
+  }
+
+  repeated PhoneNumber phones = 4;
+
+  google.protobuf.Timestamp last_updated = 5;
+}
+
+enum PhoneType {
+  PHONE_TYPE_UNSPECIFIED = 0;
+  PHONE_TYPE_MOBILE = 1;
+  PHONE_TYPE_HOME = 2;
+  PHONE_TYPE_WORK = 3;
+}
+
+// Our address book file is just one of these.
+message AddressBook {
+  repeated Person people = 1;
+}

langs/group-pine/proto/def/arborium.yaml

@@ -0,0 +1,24 @@
+repo: https://github.com/coder3101/tree-sitter-proto
+commit: d65a18ce7c2242801f702770114ad08056c7f8c9
+license: MIT
+
+grammars:
+  - id: proto
+    name: Protocol Buffers
+    tag: data
+    tier: 3
+    icon: vscode-icons:file-type-protobuf
+    aliases:
+      - protobuf
+
+    inventor: Google
+    year: 2008
+    description: Protocol Buffers are a language-neutral, platform-neutral extensible mechanism for serializing structured data.
+    link: https://protobuf.dev
+    trivia: The first release of Protocol Buffers was "Proto2"; "Proto1" only existed internally at Google.
+
+    samples:
+      - path: samples/addressbook.proto
+        description: Address book example from the Go Protocol Buffer tutorial.
+        link: https://protobuf.dev/getting-started/gotutorial
+        license: BSD-3-Clause