add CI workflow running go vet and go test

Adds .gitea/workflows/ci.yml: on push to main and on pull requests, run
`go vet ./...` then `go test ./...` in a golang:1.21-alpine container.

Also removes .github/workflows/test.yml, which only triggered on a
`develop` branch that no longer exists and depended on an external
Discord notification action and an unset DISCORD_WEBHOOK secret.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -0,0 +1,26 @@
+# Vet and test the package. This is a pure Go library -- no build
+# step, no services -- so CI just runs `go vet` then `go test` on
+# every push to main and every pull request.
+
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    container:
+      image: golang:1.21-alpine
+    steps:
+      - name: Install checkout dependencies
+        run: apk add --no-cache git nodejs
+      - uses: actions/checkout@v4
+      - name: go vet
+        run: go vet ./...
+      - name: go test
+        run: go test ./...

.github/workflows/test.yml

@@ -1,47 +0,0 @@
-name: Test
-
-on:
-  pull_request:
-    branches:
-      - develop
-  push:
-    branches:
-      - develop
-
-jobs:
-  test:
-    name: Test
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-
-      - name: Set up Go
-        uses: actions/setup-go@v5
-        with:
-          go-version: ^1.21.0
-
-      - name: Display Go version
-        run: go version
-
-      - name: Install dependencies
-        run: go get
-
-      - name: Run tests
-        run: go test -v
-
-  notify:
-    name: Send Discord workflow notification
-    runs-on: ubuntu-latest
-    needs: test
-    steps:
-      - name: Send notification
-        uses: annybs/action-notify-discord@v1
-        if: ${{ always() }}
-        with:
-          repository: ${{ github.repository }}
-          result: ${{ needs.test.result }}
-          run-id: ${{ github.run_id }}
-          run-number: ${{ github.run_number }}
-          webhook-url: ${{ secrets.DISCORD_WEBHOOK }}
-          workflow: ${{ github.workflow }}