ci: refactor GitHub Actions workflows and dependencies

- Rename GitHub Actions workflow file from `test.yml` to `testing.yml`
- Change workflow job name from `checks` to `testing`
- Update GitHub Actions `checkout` to version 4
- Remove specific Go version in favor of determining it from `go.mod`
- Update GitHub Actions `setup-go` to version 5
- Update GitHub Actions `cache` to version 4
- Add `golangci-lint` action with specified version and timeout arguments

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

.gitea/workflows/testing.yml

@@ -1,4 +1,4 @@
-name: checks
+name: testing
 on:
   - push
   - pull_request
@@ -12,10 +12,12 @@ jobs:
     name: check and test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-go@v3
+      - uses: actions/checkout@v4
         with:
-          go-version: '>=1.20.1'
+          fetch-depth: 0 # all history for all branches and tags
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: "go.mod"
       - uses: https://gitea.com/actions/go-hashfiles@v0.0.1
         id: hash-go
         with:
@@ -24,9 +26,14 @@ jobs:
             go.sum
       - name: cache go
         id: cache-go
-        uses: https://github.com/actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             /go_path
             /go_cache
           key: go_path-${{ steps.hash-go.outputs.hash }}
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v3
+        with:
+          version: v1.56.2
+          args: --timeout 5m