Add support for CompositeTrigger

[Dirreke]

This is a BREAKING change.

This will support CompositeTriggerPolicy ([log4j]https://logging.apache.org/log4j/2.x/manual/filters.html#compositefilter).

It combines multiple triggering policies and returns true if any of the configured policies return true.

---

In addition, the following changes have been made.

• Bump MSRV to 1.69.
• Update examples log_to_file_with_rolling_file.

[codecov-commenter]

Codecov Report

Attention: 11 lines in your changes are missing coverage. Please review.

Comparison is base (c981ca4) 63.01% compared to head (bd31a6d) 62.96%.

Files	Patch %	Lines
src/append/rolling_file/policy/compound/mod.rs	40.00%	9 Missing :warning:
...ppend/rolling_file/policy/compound/trigger/time.rs	89.47%	2 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #342 +/- ## ========================================== - Coverage 63.01% 62.96% -0.05% ========================================== Files 24 24 Lines 1560 1577 +17 ========================================== + Hits 983 993 +10 - Misses 577 584 +7 ```

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[bconn98]

@Dirreke FYI this would need to go in a 2.0 release as it's a breaking change to the API

[Dirreke]

@Dirreke FYI this would need to go in a 2.0 release as it's a breaking change to the API

Agree.