Box the error type

[chmp]

Benches:

• main:
  • https://github.com/chmp/serde_arrow/actions/runs/21841553845
  • https://github.com/chmp/serde_arrow/actions/runs/21880221565
  • https://github.com/chmp/serde_arrow/actions/runs/21880531208
• feature/boxed-error
  • https://github.com/chmp/serde_arrow/actions/runs/21842103778
  • https://github.com/chmp/serde_arrow/actions/runs/21880225074
  • https://github.com/chmp/serde_arrow/actions/runs/21880535854

Change:

benchmark	main	feature/boxed-error	change
complex_1000	[7.77, 7.28, 6.87]	[7.02, 6.99, 6.87]	0,960
primitives_1000	[5.04, 4.97, 4.65]	[4.08, 3.87,3.79]	0.779