Add folder anatomy (scripts/agent.py + references/api-reference.md) for 648 cybersecurity skills

Complete skill folder anatomy across all cybersecurity skills:
- scripts/agent.py: 80-150 line Python agents using real libraries (impacket,
  boto3, azure-mgmt-*, kubernetes, pefile, yara, scapy, shodan, stix2, etc.)
- references/api-reference.md: real API documentation with method signatures
- LICENSE: MIT license for all skill folders

skills/performing-sqlite-database-forensics/references/api-reference.md

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+# API Reference: SQLite Database Forensics
+
+## SQLite File Header (First 100 Bytes)
+
+| Offset | Size | Description |
+|--------|------|-------------|
+| 0 | 16 | Magic: `SQLite format 3\000` |
+| 16 | 2 | Page size (512-65536; 1 means 65536) |
+| 24 | 4 | File change counter |
+| 28 | 4 | Database size in pages |
+| 32 | 4 | First freelist trunk page |
+| 36 | 4 | Total freelist pages |
+| 52 | 4 | Text encoding (1=UTF-8, 2=UTF-16le, 3=UTF-16be) |
+
+## Page Types
+
+| Type Byte | Description |
+|-----------|-------------|
+| `0x02` | Index interior (B-tree) |
+| `0x05` | Table interior (B-tree) |
+| `0x0A` | Index leaf (B-tree) |
+| `0x0D` | Table leaf (B-tree) |
+
+## Timestamp Decoders
+
+| Format | Epoch | Conversion |
+|--------|-------|------------|
+| Unix | 1970-01-01 | `datetime.utcfromtimestamp(val)` |
+| Chrome/WebKit | 1601-01-01 | `(val / 1e6) - 11644473600` seconds since Unix epoch |
+| Mac Absolute | 2001-01-01 | `datetime(2001,1,1) + timedelta(seconds=val)` |
+| Mozilla PRTime | 1970-01-01 | `val / 1e6` seconds since Unix epoch |
+
+## Common Forensic Databases
+
+| Application | File | Key Tables |
+|------------|------|------------|
+| Chrome | `History` | `urls`, `visits`, `downloads` |
+| Firefox | `places.sqlite` | `moz_places`, `moz_historyvisits` |
+| WhatsApp | `msgstore.db` | `messages`, `chat_list` |
+| iMessage | `sms.db` | `message`, `handle`, `chat` |
+| Android SMS | `mmssms.db` | `sms`, `threads` |
+
+## Python Libraries
+
+| Library | Version | Purpose |
+|---------|---------|---------|
+| `sqlite3` | stdlib | Query database tables |
+| `struct` | stdlib | Parse binary header and page structures |
+| `os` / `pathlib` | stdlib | File size and path operations |
+
+## References
+
+- SQLite File Format: https://www.sqlite.org/fileformat2.html
+- SQLite WAL Format: https://www.sqlite.org/wal.html
+- Belkasoft SQLite Analysis: https://belkasoft.com/sqlite-analysis
+- Sanderson Forensics SQLite: https://sqliteforensictoolkit.com/