feat: Add fromdateiso8601 and todateiso8601

[yann-combarnous]

Support for built-in fromdateiso8601 and todateiso8601.

Based on PR #322, taking into account reviewer comments.

Fixes #321

@eiiches , FYI

[eiiches]

Thank you for submitting a pull request. LGTM 👍

[eiiches]

Oops, it seems that fromdateiso8601 shouldn't accept fractional seconds. This has to be fixed before publishing a stable release because the fix to disallow fractional seconds would be a breaking change. Are you willing to submit a fix? @yann-combarnous

$ jq-1.7.1 fromdateiso8601
"2024-11-25T14:13:48.123Z"
jq: error (at <stdin>:2): date "2024-11-25T14:13:48.123Z" does not match format "%Y-%m-%dT%H:%M:%SZ"

$ java -jar jackson-jq-cli-1.1.1-20241125.141032-1.jar  'fromdateiso8601'
"2024-11-25T14:13:48.123Z"
1732544028

[yann-combarnous]

Oops, it seems that fromdateiso8601 shouldn't accept fractional seconds. This has to be fixed before publishing a stable release because the fix to disallow fractional seconds would be a breaking change. Are you willing to submit a fix? @yann-combarnous

$ jq-1.7.1 fromdateiso8601
"2024-11-25T14:13:48.123Z"
jq: error (at <stdin>:2): date "2024-11-25T14:13:48.123Z" does not match format "%Y-%m-%dT%H:%M:%SZ"

$ java -jar jackson-jq-cli-1.1.1-20241125.141032-1.jar  'fromdateiso8601'
"2024-11-25T14:13:48.123Z"
1732544028

Lack of handling for fractional seconds is raised as a bug, not feature request in JQ, see jqlang/jq#2224 .

So happy to reproduce the bug, if you want me to.

[yann-combarnous]

Looks pretty simple to add: from the instant, call getNano and if the value is different than 0, throw exception.