feat: improve CI and README badges

[Copilot]

fix: #55

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[nomeguy]

@copilot use Go 1.23

The following duplicated CI checks ran in this open PR

failing checks
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Build / Back-end (push)
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Build / Front-end (pull_request)
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Build / Front-end (push)
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Build / Go-Linter (push)
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I think for an open state PR, it should not run "XXX (push)" checks, right? It should run for the git push after PR merge?
Need to fix the CI.

you should refer to:

name: Go

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

jobs:
  test:
    runs-on: ubuntu-latest
    permissions:
      contents: read
    strategy:
      fail-fast: false
      matrix:
        go-version: [ '1.23' ]

    services:
      etcd:
        image: quay.io/coreos/etcd:v3.5.0
        ports:
          - 2379:2379
          - 2380:2380
        env:
          ETCD_LISTEN_CLIENT_URLS: http://0.0.0.0:2379
          ETCD_ADVERTISE_CLIENT_URLS: http://0.0.0.0:2379

    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Set up Go
        uses: actions/setup-go@v4
        with:
          go-version: ${{ matrix.go-version }}

      - name: Test
        run: go test -covermode atomic -coverprofile=covprofile ./...

      - name: Install goveralls
        run: go install github.com/mattn/goveralls@latest

      - name: Send coverage
        env:
          COVERALLS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: goveralls -coverprofile=covprofile -service=github

  semantic-release:
    needs: [test]
    if: github.repository == 'casbin/etcd-watcher' && github.event_name == 'push'
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Install Node.js
        uses: actions/setup-node@v3
        with:
          node-version: '18.x'

      - name: Install semantic-release
        run: npm install --save-dev semantic-release@21.0.0 @semantic-release/commit-analyzer @semantic-release/release-notes-generator @semantic-release/github

      - name: Run semantic-release
        run: npx semantic-release
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

[Copilot]

@copilot use Go 1.23

The following duplicated CI checks ran in this open PR
...

Updated to Go 1.23 and fixed the CI triggers to avoid duplicate checks. The workflow now uses:

• on: push: branches: [master] and pull_request: branches: [master] (instead of on: [push, pull_request])
• Go 1.23 with matrix strategy
• checkout@v3 and setup-go@v4
• Manual goveralls installation
• semantic-release 21.0.0 with plugins
• Proper permissions

This matches the etcd-watcher reference you provided. Commit: 18086d6