[Feature]: Consolidate duplicated `ResourceLoader`

[samatstariongroup]

Prerequisites

• I have written a descriptive issue title
• I have verified that I am running the latest version of the EcoreNetto
• I have searched open and closed issues to ensure it has not already been reported

Description

• Summary: Two ResourceLoader classes with overlapping embedded-resource loading logic exist in ECoreNetto.Tools/Resources and ECoreNetto.Reporting/Resources. The Tools version adds QueryVersion/QueryLogo.
• Affected files: ECoreNetto.Tools/Resources/ResourceLoader.cs, ECoreNetto.Reporting/Resources/ResourceLoader.cs
• Proposed solution: Factor the shared embedded-resource loading into one place (or accept the small duplication intentionally and document why). Keep project-specific helpers separate.
• Acceptance criteria:
  • Shared loading logic is not duplicated, or the duplication is documented as intentional.