feat: implement README discovery optimizer with full validation gates (#18)

[iyeanur6-cyber]

Proposed Solution: README Discovery Optimizer (#18)

Implemented a pure, deterministic Python CLI script scripts/discovery_optimizer.py that comprehensively audits profile repositories to enforce robust organic SEO and metadata discovery standards.

Acceptance Criteria Fulfilled:

• Comprehensive Diagnostic Framework: Scans for clear top-level descriptions, high-positioned installation commands, explicit GitHub topic metrics, heading-level domain keywords, source template lineage, local validation runbooks, security/license declarations, and social sharing guides.
• Zero In-Place Intrusion: By default, it operates as a safety checker, reporting actionable recommendations via standard outputs without altering core user text.
• Safe Mechanical Fixes: Incorporates a strict --fix engine that exclusively introduces structured safe metadata and templates comments without overwriting or replacing original positioning.
• Format Interoperability: Fully supports --json and --markdown parsing pipelines for streamlined continuous integration reporting.
• Zero External Dependencies: Operates entirely via built-in modules without invoking remote endpoints, guaranteeing perfect pipeline compliance.
• Automation Pipeline Integration: Integrated seamlessly into the existing Makefile under the make validate target routine.

Execution and Validation Run:

• python3 scripts/discovery_optimizer.py . --json
• python3 scripts/discovery_optimizer.py . --markdown
• Verified locally to pass make validate syntax and runtime gates smoothly.

Solana Wallet Address: 297hZrAVMi3rujS1vxSEbrD43ezfms7snkPHaTGaLeka