feat: parse TAF messages without delivery time

[mivek]

When a TAF message does not contain a delivery time, the validity time is taken as delivery time.

Back-port of mivek/python-metar-taf-parser#73

[github-actions]

Please check on sonarcloud https://sonarcloud.io/project/pull_requests_list?id=io.github.mivek%3AmetarParser that the PR does not add any issue.

[Copilot]

Pull Request Overview

This PR updates the TAF parser to handle messages that omit an explicit delivery time by using the validity start as the delivery time.

• parseDeliveryTime now returns a boolean indicating if the token was a delivery time, so the parser can skip tokens appropriately.
• TAFParser uses the return value to decide whether to advance to the validity time token or reuse it.
• A new unit test (testParseWithoutDeliveryTime) verifies the no-delivery-time scenario.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
metarParser-parsers/src/main/java/io/github/mivek/parser/TAFParser.java	Adjusted index increment logic around delivery/validity tokens
metarParser-parsers/src/main/java/io/github/mivek/parser/AbstractWeatherCodeParser.java	Changed parseDeliveryTime to return boolean and updated its logic
metarParser-parsers/src/test/java/io/github/mivek/parser/TAFParserTest.java	Added a test for parsing a TAF message without an explicit delivery time

Comments suppressed due to low confidence (2)

metarParser-parsers/src/main/java/io/github/mivek/parser/AbstractWeatherCodeParser.java:51

• [nitpick] The method name parseDeliveryTime doesn’t convey its boolean return semantics. Consider renaming to something like tryParseDeliveryTime or consumeDeliveryTimeIfPresent for clarity.

    boolean parseDeliveryTime(final AbstractWeatherCode weatherCode, final String time) {

metarParser-parsers/src/test/java/io/github/mivek/parser/TAFParserTest.java:960

• It would be helpful to add a complementary test case where the TAF message includes an explicit delivery time (with minutes) to ensure the original behavior remains correct.

    void testParseWithoutDeliveryTime() throws ParseException {