(MINOR) Add new API function `XmpFile::try_close` which will report any error encountered when closing a file #841

Job	Run time
Unit tests (windows-latest, stable)	2m 33s
Unit tests (windows-latest, 1.70.0)	2m 2s
Unit tests (macos-latest, stable)	1m 31s
Unit tests with minimum versions of direct dependencies (windows-latest)	2m 13s
Unit tests (aarch64-unknown-linux-gnu, stable)	1m 46s
Unit tests (macos-latest, 1.70.0)	1m 13s
Unit tests with minimum versions of direct dependencies (macos-latest)	1m 10s
Unit tests with default features disabled (windows-latest)	1m 35s
Unit tests (aarch64-unknown-linux-gnu, 1.70.0)	2m 3s
Unit tests (macos-13-xlarge, stable)	1m 1s
Unit tests with minimum versions of direct dependencies (ubuntu-latest)	1m 25s
Unit tests with default features disabled (macos-latest)	1m 20s
Unit tests (macos-13-xlarge, 1.70.0)	1m 1s
Unit tests with default features disabled (ubuntu-latest)	54s
Unit tests (ubuntu-latest, stable)	56s
Unit tests (ubuntu-latest, 1.70.0)	1m 6s
Enforce Rust code format	14s
Clippy	52s
Preflight docs.rs build	22s
Preflight crate publish (ubuntu-latest, stable)	52s
License / vulnerability audit (advisories)	17s
License / vulnerability audit (bans licenses sources)	17s
ReadXMP example	42s
Check for unused dependencies	47s
Ensure (MAJOR) tag is used when making an API breaking change	4m 22s
	32m 34s

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