Add With field to jobparser.Job (#37)

Partially Fixes [gitea/act_runner#91 comment](https://gitea.com/gitea/act_runner/issues/91#issuecomment-734544)

nektos/act has added `With` to support reusable workflows (see [code](https://github.com/nektos/act/blob/68c72b9a51f4fa586af62619f9e6361e023a5d48/pkg/model/workflow.go#L160))

GitHub actions also support [`jobs.<job_id>.with`](https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idwith)

Reviewed-on: https://gitea.com/gitea/act/pulls/37
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Zettat123 <zettat123@gmail.com>
Co-committed-by: Zettat123 <zettat123@gmail.com>

pkg/jobparser/testdata/has_with.in.yaml

@@ -0,0 +1,15 @@
+name: test
+jobs:
+  job1:
+    name: job1
+    runs-on: linux
+    uses: .gitea/workflows/build.yml
+    with:
+      package: service
+
+  job2:
+    name: job2
+    runs-on: linux
+    uses: .gitea/workflows/build.yml
+    with:
+      package: module

pkg/jobparser/testdata/has_with.out.yaml

@@ -0,0 +1,17 @@
+name: test
+jobs:
+  job1:
+    name: job1
+    runs-on: linux
+    uses: .gitea/workflows/build.yml
+    with:
+      package: service
+---
+name: test
+jobs:
+  job2:
+    name: job2
+    runs-on: linux
+    uses: .gitea/workflows/build.yml
+    with:
+      package: module