uefi-raw: add time feature and integration with time crate

By adding a convenient integration with `OffsetDateTime` of the `time`
crate, we make `Time` much more usable. This commit adds the helpers
`to_offset_date_time()` and
`to_offset_date_time_with_default_timezone()`: the latter helps to
better cope with Time::UNSPECIFIED_TIMEZONE.

Author: phip1611

Cargo.lock

@@ -23,6 +23,7 @@ rust-version = "1.88"
 bitflags = "2.0.0"
 log = { version = "0.4.5", default-features = false }
 ptr_meta = { version = "0.3.0", default-features = false, features = ["derive"] }
+time = { version = "0.3", default-features = false, features = [] }
 uguid = "2.2.1"
 
 [patch.crates-io]

Cargo.toml

@@ -12,6 +12,10 @@
 - Added new type `SerialIoProtocolRevision`
 - Added new type `SerialIoProtocol_1_1` as companion for `SerialIoProtocol`
   that includes the  `device_type_guid` parameter
+- Added the `time` feature which integrates `struct Time` closely with
+  `OffsetDateTime` from the [time crate](https://crates.io/crates/time).
+  - `Time::to_offset_date_time`
+  - `Time::to_offset_date_time_with_default_timezone`
 
 ## Changed
 - Switched `*const Self` to `*mut Self` in `SerialIoProtocol::set_attributes()`

uefi-raw/CHANGELOG.md

@@ -20,7 +20,12 @@ rust-version = "1.85.1"
 
 [dependencies]
 bitflags.workspace = true
+time = { workspace = true, optional = true }
 uguid.workspace = true
 
+[features]
+default = ["time"]
+time = ["dep:time"]
+
 [package.metadata.docs.rs]
 rustdoc-args = ["--cfg", "docsrs"]