Simplify README - remove redundancy, use ./tlsanalyzer consistently

- Quick Start: clone, build, run with ./tlsanalyzer (like CryptoScan)
- Remove redundant Installation section
- Consolidate Usage examples with inline comments
- Link to docs/ for detailed guides instead of duplicating content
- Remove verbose output examples (JSON, CBOM)
- Simplify Contributing section (link to CONTRIBUTING.md)

Author: thebenignhacker