Refactor remaining field processing into dedicated processors

[rfc2822]

• Moves remaining processors into dedicated classes.
• Logic is only minimally touched.
• Defines remaining tests.

[Copilot]

Pull Request Overview

This pull request refactors calendar event processing by extracting inline field processing logic into dedicated processor classes, improving code organization and maintainability. The main changes involve moving time field handling, recurrence field processing, and other event field processing logic into specialized processor classes.

• Extracts time field processing (DTSTART, DTEND, DURATION) into TimeFieldsProcessor
• Creates dedicated processors for recurrence fields and original instance time handling
• Refactors the main LegacyAndroidEventProcessor to use the new processor architecture

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
TimeFieldsProcessor.kt	New processor handling DTSTART, DTEND, DURATION, and ALL_DAY field processing
OriginalInstanceTimeProcessor.kt	New processor for handling ORIGINAL_INSTANCE_TIME field processing
RecurrenceFieldsProcessor.kt	New processor for handling RRULE, RDATE, EXRULE, EXDATE fields
LegacyAndroidEventProcessor.kt	Refactored to use new processor architecture, removing inline field processing
RemindersProcessor.kt	Updated to use event title from entity instead of to.summary
AndroidEventFieldProcessor.kt	Added exception documentation
TimeFieldsBuilder.kt	Updated exception type from local to remote resource
AndroidEntityBuilder.kt	Added exception documentation
Various test files	New test files for the extracted processors and updated existing tests

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[sunkup]

It already looks so much cleaner now: 👍