[fauntlet] add type1 support

[dfrg]

Adds support for detecting and processing type1 fonts to fauntlet. Also adds a check for a few tests fonts to CI.

Additionally makes the type1 support in read-fonts visible and fixes a few warnings that were missed due to the expect(unused) attribute.

First commit contains an intentionally broken type1 scale factor in fauntlet to prove that the CI checks are working.

Based on #1761 which must land first.

[dfrg]

Failing fauntlet check: https://github.com/googlefonts/fontations/actions/runs/23069665578/job/67016691012?pr=1762

Run cargo run --release -p fauntlet -- compare-glyphs --print-paths --exit-on-fail font-test-data/test_data/type1/*.pf*
    Finished `release` profile [optimized] target(s) in 0.06s
     Running `target/release/fauntlet compare-glyphs --print-paths --exit-on-fail font-test-data/test_data/type1/notoserif-regular.subset.pfa font-test-data/test_data/type1/notoserif-regular.subset.pfb`
["font-test-data/test_data/type1/notoserif-regular.subset.pfa"]
["font-test-data/test_data/type1/notoserif-regular.subset.pfb"]
["font-test-data/test_data/type1/notoserif-regular.subset.pfa"#0 ppem: 8 coords: [] hinting None] glyph id 1 outline doesn't match:
- MoveTo { x: 0.296875, y: 0.0 }
- LineTo { x: 2.625, y: 0.0 }
- LineTo { x: 2.625, y: 0.34375 }
- LineTo { x: 2.53125, y: 0.34375 }