Add explanation of fixable in `--statistics` command #34046

Job	Run time
mkdocs	2m 23s
pre-commit	34s
cargo fmt	15s
Determine changes	9s
python package	1m 10s
cargo build (release)	4m 33s
cargo clippy	1m 54s
cargo build (msrv)	3m 33s
benchmarks	5m 22s
cargo fuzz	4m 29s
cargo shear	4m 57s
cargo test (wasm)	1m 27s
cargo test (linux)	4m 4s
cargo test (windows)	11m 39s
formatter instabilities and black similarity	0s
test scripts	56s
ecosystem	8m 51s
test ruff-lsp	14s
Fuzz the parser	0s
	56m 30s

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