Document implementation status and correct false achievement claims

[Copilot]

Problem

README claimed multiple features as "Achieved" (CLI skeleton, deterministic makepkg wrapper, snapshot support, AUR rebuild sandbox). Repository contains only documentation—no source code, build files, or tests exist.

Changes

Documentation Accuracy

• README.md: Removed false "Achieved" claims, added "Pre-Alpha / Planning" status with warnings
• my-laptop.repro.yaml: Fixed YAML syntax error (line 16: invalid inline hash format)

# Before (invalid)
- visual-studio-code-bin: hash: sha256:...

# After
- name: visual-studio-code-bin
  hash: sha256:placeholder_hash_here

Gap Analysis (6 new documents, 2,233 lines)

• IMPLEMENTATION_STATUS.md: Complete component inventory (200+ missing items), 7-phase implementation plan, risk assessment, timeline estimates
• REALITY_CHECK.md: Quick reference tables comparing documented vs actual state
• TODO.md: Task tracking with priority matrix (P0-P3), organized by phase
• INSPECTION_SUMMARY.md: Executive findings, statistics, recommendations
• NAVIGATION.md: Documentation index with reading order recommendations
• CONTRIBUTING.md: Contribution workflow, code standards, security requirements

Project Foundation

• .gitignore: Rust/Python/IDE exclusions

Key Metrics

Metric	Value
Implementation	0% (0 lines of code)
Documentation	100%
Identified tasks	200+ across 7 phases
Estimated timeline	8-12 weeks to v0.1-alpha

All claimed features are now accurately represented as planned, not implemented. Gap between documentation and reality is explicit and quantified.

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