[Docs] Update all documentation after oclite rename #28

Context

After #25 (rename to oclite) is complete, all documentation needs to be updated.

Scope

Files to Update

• README.md - Update project name, keep attribution
• CONTRIBUTING.md (if exists)
• Any docs/ files
• Code comments referencing 'opencode'
• Error messages and CLI help text
• package.json descriptions

Attribution to Preserve

Always keep reference to upstream:

Based on [OpenCode](https://github.com/anomalyco/opencode) by Anomaly Co (MIT License)

Search Patterns

# Find references to update
rg -i 'opencode' --type md
rg -i 'opencode' packages/opencode/src/ -l

Dependencies

• Blocked by [Repo] Rename repository from opencode to oclite #25 (rename repo first)

Acceptance Criteria

• All user-facing strings say 'oclite'
• Attribution to OpenCode preserved
• No broken links
• CLI --help shows correct name