Add environments and deployments to the actions.

[nhumrich]

This implements #30079

Screenshots:

example workflow file showing two different syntaxes for environments (as supported by github):

name: Gitea Actions Demo
run-name: ${{ github.event.head_commit.message }} (${{ gitea.actor }})
on: [push]

jobs:
  prebuild:
    runs-on: ubuntu-latest
    steps:
      - run: echo "🎉 The job was automatically triggered by a ${{ gitea.event_name }} event."
      - run: echo "🐧 This job is now running on a ${{ runner.os }} server hosted by Gitea!"
      - run: echo "🔎 The name of your branch is ${{ gitea.ref }} and your repository is ${{ gitea.repository }}."
      - name: Check out repository code
        uses: actions/checkout@v4
      - run: echo "💡 The ${{ gitea.repository }} repository has been cloned to the runner."
      - run: echo "🖥️ The workflow is now ready to test your code on the runner."
      - name: List files in the repository
        run: |
          ls ${{ gitea.workspace }}
      - run: echo "🍏 This job's status is ${{ job.status }}."

  test:
    runs-on: ubuntu-latest
    steps:
      - name: do some testing
        run: |
          echo "test1"
          echo "test2"

  deploy-staging:
    runs-on: ubuntu-latest
    needs: test
    environment: staging
    steps:
      - name: deploy
        run: |
          echo "deploying image:${{ gitea.sha }}"
          sleep 4

  deploy-production:
    runs-on: ubuntu-latest
    needs: deploy-staging
    environment: 
      name: production
      url: https://production.example.org
    steps:
      - name: deploy
        run: |
          echo "deploying image:${{ gitea.sha }}"
          sleep 10

[lunny]

Suggested change

// Gitea 1.25.0 starts at database version 322

[lunny]

Merge the two migrations into one.

[lunny]

Suggested change

	form := web.GetForm(ctx).(*forms.AddSecretForm)
	form := web.GetForm(ctx).(*forms.AddEnvironmentForm)

[lunny]

AutoRerun should be another feature? If that, it's better to split it into another PR.

[lunny]

Move it to another sub template.

[nhumrich]

Thanks for the feedback. I will address these :)