v0.2.0: Format-specific renderers, OCR support, and edge case handling

Features:
- Format-specific renderers for all file types (config, PDF, OpenAPI, CSV, etc.)
- OCR support for scanned PDFs and images via Tesseract
- Interactive TUI graph view (--graph) and stats dashboard (--stats)
- Content diffing with unified diff output
- Risk-based change filtering (--breaking-only)
- Cross-platform Unicode/emoji support on Windows

Improvements:
- Graceful error handling for edge cases (password-protected PDFs, malformed files)
- Paginated output for large comparisons (100+ pages)
- Enhanced README with comprehensive documentation
- Example files for all supported formats

New files:
- LICENSE (MIT)
- examples/ with before/after test files
- Format-specific renderers in output/formats/
- Content diff engine (diff/content_diff.py)
- Stats visualization (output/stats.py)

Author: aayushadhikari7

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 what-changed contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.