feat: Backport Rails framework classification

[spdawson]

Description

Create basic structure for framework classification. In this initial implementation, only the Rails framework is classified; the other frameworks will be classified in future work.

Sample YAML output for detectors report:

- classification:
    Decision:
        reason: recipe_match
        state: valid
    recipe_match: true
    recipe_name: PostgreSQL
  detector_type: rails
  source:
    column_number: null
    filename: config/database.yml
    language: YAML
    language_type: data
    line_number: 85
    text: null
  type: framework_classified
  value:
    adapter: postgresql
    name: ""

Checklist

• I've added test coverage that shows my fix or feature works as expected.
• I've updated or added documentation if required.
• I've included usage information in the description if CLI behavior was updated or added.
• PR title follows Conventional Commits format

[swarmia]

✅  Linked to AMA-3194 · Create framework classifier
➡️  Part of AMA-3080 · Backport framework classification from ruby app
➡️  Part of AMA-2947 · OSS - Curio CLI

[cfabianski]

Just one small question (@elsapet might be interested as well)
Otherwise, that looks good

[elsapet]

Looks good 👏