Expand audited provider icon catalogs

[konojunya]

Summary

• expand the asset-free catalog to 1,051 stable IDs: 305 AWS, 45 Google Cloud, 639 Azure, and 62 curated tool icons
• import only user-selected local archives, including both audited Google Cloud archives, without downloading, uploading, or bundling provider SVG bytes
• verify complete archive hashes, sanitize official SVGs, preserve multi-source and per-brand provenance, and emit exact notices
• add searchable stack icons list metadata plus scalable public documentation inputs
• prepare the CLI 0.2.0 release

Depends on stack-sh/theme#11 and stack-sh/engine#17.

Validation

• imported all 1,051 icons from the five audited archives into four local packs
• rendered one AWS, Google Cloud category, Azure decimal-viewBox, and Simple Icons brand icon together with an exact notice
• node scripts/validate-provider-catalogs.mjs
• cargo fmt --all --check
• cargo test --all-features --locked
• cargo clippy --all-targets --all-features --locked -- -D warnings
• RUSTDOCFLAGS=-D warnings cargo doc --all-features --no-deps --locked
• cargo build --release --locked
• python3 scripts/validate-render.py
• cargo llvm-cov --all-features --locked --fail-under-lines 90 --fail-under-functions 95 --fail-under-regions 90
• git diff --check

The repository contains catalog metadata only. Provider archives, source SVGs, and generated local packs are not committed.