feat: rebrand

[danilowoz]

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Summary by cubic

Rebrands the CLI with a new banner, wordmark, and tagline, and adds consistent, colored status indicators across commands for clearer output.

• New Features
  • New adaptive banner and tagline printed on startup and during login; falls back to the wordmark() on narrow terminals.
  • Unified brand utilities in src/lib/brand.ts (wordmark, TAGLINE, and symbol constants); spinner and tests updated.
  • Table renderer now supports statusColumn with tone-based coloring; dimmed borders and bold headers for readability.
  • Consistent status indicators and tones for automations, broadcasts, contact imports, domains, emails, templates, webhooks, and logs; symbols generated via String.fromCodePoint() for safe Unicode handling.
  • Help text and examples use color for section headers and commands; added hint: “Run resend --help for details.”
  • README updated with new ASCII art; .gitignore adds ~/.volta.

^{Written for commit 7fe6981. Summary will update on new commits.}