DE-2945 Maintenance - Implement dependabot as package manager - Add basic meltano CI

[SBurwash]

Ticket (DE-2945)

name: Validate Meltano Install
on:
pull_request:
types:
- opened
- reopened
- synchronize

jobs:
setup-meltano:
name: Validate meltano configurations
runs-on: ubuntu-latest
timeout-minutes: 20

steps:
  - uses: actions/checkout@v4
  - run: pip install meltano boto3
  - name: Install dependencies
    run: meltano install --clean
  - name: Validate meltano install
    run: meltano schedule list

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