refactor(cli): plain-text console output; drop rich; quiet transformers

cli.py now emits plain ASCII through a small click.echo shim
(_Console / _Table / _Progress) instead of rich: no colors, markup tags,
panels, progress bar, or Unicode glyphs (Warning: / -> / ... and dropped
checkmark/cross marks). identify and metadata tables render as indented
plain lines.

- drop rich from dependencies (pyproject.toml + uv.lock)
- __init__: set TRANSFORMERS_VERBOSITY=error (setdefault) plus a warnings
  filter so the transformers Siglip2ImageProcessorFast deprecation no
  longer prints at CLI startup (it fires from the eager noai import)
- TestGpuHintMarkup: the [gpu] hint is now printed verbatim; docstring updated
- CLAUDE.md: replace the obsolete rich-markup lesson, note the verbosity fix

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

uv.lock

@@ -2874,7 +2874,6 @@ dependencies = [
     { name = "piexif" },
     { name = "pillow" },
     { name = "python-dotenv" },
-    { name = "rich" },
 ]
 
 [package.optional-dependencies]
@@ -2948,7 +2947,6 @@ requires-dist = [
     { name = "pytest-cov", marker = "extra == 'dev'", specifier = ">=4.1.0" },
     { name = "python-dotenv", specifier = ">=1.0.0" },
     { name = "remove-ai-watermarks", extras = ["gpu", "detect", "trustmark", "lama", "dev"], marker = "extra == 'all'" },
-    { name = "rich", specifier = ">=13.0.0" },
     { name = "ruff", marker = "extra == 'dev'", specifier = ">=0.4.0" },
     { name = "safetensors", marker = "extra == 'gpu'" },
     { name = "tokenizers", marker = "extra == 'gpu'", specifier = ">=0.22,<0.23" },