feat(im): Add support for `serde` in `eyeball-im` #227

Job	Run time
Check Formatting	11s
Run tests (Rust stable)	15s
Check documentation (Rust stable)	23s
Run clippy (Rust nightly)	16s
Run tests with miri (Rust nightly)	57s
Spell Check with Typos	6s
	2m 8s

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