Ry

- update to pyo3 v0.23.5

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- `ryo3-jiter`
- Allow `PyBytes` wrapper/buffer protocol to be given
- renamed `jiter_cache_clear` to `json_cache_clear` and `jiter_cache_usage` to
`json_cache_usage`
- Removed `parse_json_str` just use `parse_json` with `str` input
- `ryo3-fspath`
- Allow read/write to take `ry.Bytes` or `Bytes` objects

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- `ryo3-core`
- got rid of `ryo3-types` and moved into `ryo3-core`
- `ryo3-tokio`
- `read_async` and `write_async` async functions
- `ryo3-which`
- `which_re` functions accepts `ry.Regex` or `str` now
- `ryo3-std`
- `read` and `write` functions which take/return `ry.Bytes` objects
- `internal`
- Changed many many many of the structs/classes to be pyo3 `frozen` behaviour
should not be different

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- `jiff`
- Upgraded jiff to version 2
- internal
- Switch all lints from `[allow(...)]`/`![allow(...)]` to
`[expect(...)]`/`![expect(...)]`
- Removed a bunch o commented out code
- `ryo3-std`
- added several `std::fs` structs
- `ryo3-fspath`
- conversion to `pathlib.Path` by way of `FsPath.to_pathlib()`

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- internal
- Made sure each `ryo3-*` crate has a `README.md`
- `ryo3-bytes` & `ryo3-fspath`
- added `__hash__` dunders to both `Bytes` and `FsPath` structs

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- `jiff`
- Per Mr. Sushi's thoughts changed all `until`/`since` methods to use kwargs
instead of the rust-like tuples that impl `From`/`Into` as it does not
translate well to python
- Gets rid of the following inane types:

python
IntoDateDifference = (
DateDifference
| Date
| DateTime
| ZonedDateTime
| tuple[JIFF_UNIT_STRING, Date]
| tuple[JIFF_UNIT_STRING, DateTime]
| tuple[JIFF_UNIT_STRING, ZonedDateTime]
)
IntoTimeDifference = (
TimeDifference
| Time
| DateTime
| ZonedDateTime
| tuple[JIFF_UNIT_STRING, Time]
| tuple[JIFF_UNIT_STRING, DateTime]
| tuple[JIFF_UNIT_STRING, ZonedDateTime]
)
IntoDateTimeDifference = (
DateTimeDifference
| Date
| Time
| DateTime
| ZonedDateTime
| tuple[JIFF_UNIT_STRING, Date]
| tuple[JIFF_UNIT_STRING, Time]
| tuple[JIFF_UNIT_STRING, DateTime]
| tuple[JIFF_UNIT_STRING, ZonedDateTime]
)
IntoTimestampDifference = (
TimestampDifference
| Timestamp
| ZonedDateTime
| tuple[JIFF_UNIT_STRING, Timestamp]
| tuple[JIFF_UNIT_STRING, ZonedDateTime]
)


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