refactor(rust/signed-doc): add parameters field

[vlopes11]

Description

This commit replaces the ad-hoc attributes (category_id, election_id, campaign_id, brand_id) for a single parameters field, that is expected to hold document-specific validation rules.

It is in accordance to the architecture specs
https://input-output-hk.github.io/catalyst-libs/architecture/08_concepts/signed_doc/spec/

Related Issue(s)

Closes #307

Description of Changes

Ad-hoc rules are anti-pattern and they must be document-specific instead of enforced by static definitions.

Breaking Changes

• Removal of signed docs attr rules category_id, election_id, campaign_id, brand_id
• Add a centralized parameters signed docs attr rules

Screenshots

N/A

Related Pull Requests

N/A

Please confirm the following checks

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream module

[github-actions]

✅ Test Report | ${\color{lightgreen}Pass: 320/320}$ | ${\color{red}Fail: 0/320}$ |

[stevenj]

Why have we eliminated this document type?
Its a valid document type and we would have to just reintroduce it later?

[Mr-Leshiy]

No no, we have not removed the category document type.
Here what you are looking into is an old category_id field validation rule.
Which becomes a parameters validation rule inside its own mod.

[no30bit]

Nitpick -> #327
Couldn't make a classic gh suggestion, because the code spans deleted lines.