feat: add intelligent import for CSV, Excel, and PDF files

Add IntelligentImportAugmentation with support for:
- CSV: auto-detection of encoding, delimiters, and field types
- Excel: multi-sheet extraction with metadata preservation
- PDF: text extraction, table detection, and metadata extraction

Features:
- Automatic format detection from file extension or content
- Intelligent type inference (string, number, boolean, date)
- Seamless integration with neural entity extraction
- Production-ready with 69 comprehensive tests

Dependencies added:
- xlsx@^0.18.5 for Excel parsing
- pdfjs-dist@^4.0.379 for PDF parsing
- csv-parse@^6.1.0 for CSV parsing
- chardet@^2.0.0 for encoding detection

Documentation:
- Updated README with import examples
- Updated API_REFERENCE with comprehensive import() docs
- Updated import-anything.md guide
- Added working example: import-excel-pdf-csv.ts
- Updated augmentations README

package.json

@@ -147,6 +147,7 @@
     "@typescript-eslint/eslint-plugin": "^8.0.0",
     "@typescript-eslint/parser": "^8.0.0",
     "@vitest/coverage-v8": "^3.2.4",
+    "jspdf": "^3.0.3",
     "minio": "^8.0.5",
     "standard-version": "^9.5.0",
     "testcontainers": "^11.5.1",
@@ -159,13 +160,17 @@
     "@huggingface/transformers": "^3.7.2",
     "boxen": "^8.0.1",
     "chalk": "^5.3.0",
+    "chardet": "^2.0.0",
     "cli-table3": "^0.6.5",
     "commander": "^11.1.0",
+    "csv-parse": "^6.1.0",
     "inquirer": "^12.9.3",
     "ora": "^8.2.0",
+    "pdfjs-dist": "^4.0.379",
     "prompts": "^2.4.2",
     "uuid": "^9.0.1",
-    "ws": "^8.18.3"
+    "ws": "^8.18.3",
+    "xlsx": "^0.18.5"
   },
   "prettier": {
     "arrowParens": "always",