Add bypass_cache and cache_tags support

[11bit]

Closes #84 (comment)

Aligns the library with the imgproxy docs update, which added two new URL options (both imgproxy Pro):

Option	Short	Value	Format
bypass_cache	bc	boolean (1/t/true)	bc:%bypass
cache_tags	ct	list of strings	ct:%tag1:%tag2:...:%tagN

Both are documented in processing.mdx and getting_info.mdx, so they live in optionsShared/typesShared and are wired into both generateUrl and generateImageInfoUrl.

Implementation notes

• bypass_cache follows the enforceThumbnail pattern: test uses "key" in options, so an explicit false still emits bc:f rather than being dropped.
• cache_tags follows the preset pattern: guardIsNotArray plus a non-string-item check, joined with :.

Not included

The config-side half of the docs diff (IMGPROXY_ALLOW_BYPASS_CACHE, the IMGPROXY_MAX_ML_CONCURRENCY → IMGPROXY_ML_NUM_STREAMS rename, and the new ML tuning vars) is server configuration, which this package doesn't model.

Verification

• tsc --noEmit clean, eslint src tests clean
• vitest run → 99 files / 1115 tests passing (20 new)
• End-to-end spot check: generateUrl(..., { width: 10, bypass_cache: true, cache_tags: ["a","b"] }) → /bc:t/ct:a:b/w:10/plain/img; generateImageInfoUrl(..., { bc: false, ct: ["x"] }) → /bc:f/ct:x/plain/img

🤖 Generated with Claude Code

https://claude.ai/code/session_01G8Aa3xeVUCaxKtQJDzZhMo