feat: add duration type to json writer

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: -0.08% :warning:

Comparison is base (031bc7b) 83.50% compared to head (c63cdd6) 83.43%. Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1522 +/- ## ========================================== - Coverage 83.50% 83.43% -0.08% ========================================== Files 388 388 Lines 42027 42070 +43 ========================================== + Hits 35096 35100 +4 - Misses 6931 6970 +39 ``` | [Files Changed](https://app.codecov.io/gh/jorgecarleitao/arrow2/pull/1522?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jorge+Leitao) | Coverage Δ | | |---|---|---| | [src/io/json/write/serialize.rs](https://app.codecov.io/gh/jorgecarleitao/arrow2/pull/1522?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jorge+Leitao#diff-c3JjL2lvL2pzb24vd3JpdGUvc2VyaWFsaXplLnJz) | `83.75% <0.00%> (-7.97%)` | :arrow_down: | | [src/temporal\_conversions.rs](https://app.codecov.io/gh/jorgecarleitao/arrow2/pull/1522?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jorge+Leitao#diff-c3JjL3RlbXBvcmFsX2NvbnZlcnNpb25zLnJz) | `88.23% <0.00%> (-3.41%)` | :arrow_down: | ... and [6 files with indirect coverage changes](https://app.codecov.io/gh/jorgecarleitao/arrow2/pull/1522/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jorge+Leitao)

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