Folder Structure: Align CGMES 2.4 folder structure with NCP / CGMES 3.0

[Haigutus]

Follow-up to #32 (CGMES 3.0 folder alignment) for the CGMES v2.4 release branch (cgmes-v2-4). Related to #64 (add PROF for CGMES 2.4).

Current Directory Structure

CGMES/ (cgmes-v2-4)

CGMES/
├── Enhanced/
│   └── SHACL/     # SHACL constraints (flat, .ttl)
└── Original/
    └── RDFS/      # Vocabulary RDFS (…RDFSAugmented-v2_4_15-4Sep2020.rdf)

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Key Differences (vs NCP / CGMES 3.0)

• No dedicated PROF/ folder for profile descriptors. NCP and CGMES 3.0 have one (see Folder Structure: Consider aligning RDFS folder structure #32, Improvement: Add PROF also for CGMES 2.4 #64).
• RDFS and SHACL live under the Original/ and Enhanced/ sub-trees instead of the flat sibling RDFS/ and SHACL/ packages used elsewhere in the library.

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Proposed Aligned Structure

CGMES/
├── PROF/     # ← New: profile descriptors (aligned with NCP / CGMES 3.0), see #64
├── RDFS/     # ← from Original/RDFS  (filenames unchanged)
└── SHACL/    # ← from Enhanced/SHACL (filenames unchanged)

Filenames are kept as-is — only the folder layout changes, matching the "Proposed Aligned Structure" agreed in #32 for CGMES 3.0.