new: first implementation

[sttk]

This PR provides the implementation of the Err class as the first implementation of this library.

[Copilot]

Pull Request Overview

This PR implements the initial version of the exception handling library by introducing the Exc class that accepts a reason (a record) and an optional cause, and includes methods for message formatting, runtime conversion, and serialization.

• Introduces the Exc class with constructors, custom toString(), and serialization support.
• Implements comprehensive JUnit tests covering construction, getters, exception message formatting, and serialization behaviors.
• Removes legacy Sample and SampleTest files that are no longer necessary.

Reviewed Changes

Copilot reviewed 6 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/test/java/com/github/sttk/errs/ExcTest.java	Tests for the new Exc class (constructors, getters, serialization, etc.)
src/test/java/SampleTest.java	Removed legacy test file
src/main/java/module-info.java	New module declaration supporting the library
src/main/java/com/github/sttk/errs/package-info.java	Package documentation for the exception handling API
src/main/java/com/github/sttk/errs/Exc.java	New Exc class implementation with runtime conversion and serialization
src/main/java/Sample.java	Removed legacy implementation

Files not reviewed (2)

• src/main/resources/META-INF/native-image/com.github.sttk/errs/reachability-metadata.json: Language not supported
• src/test/resources/META-INF/native-image/reachability-metadata.json: Language not supported

[Copilot]

Pull Request Overview

This PR introduces the initial implementation of the Exc exception class along with comprehensive tests covering construction, message formatting, and serialization/deserialization behavior.

• Introduces the Exc class (and its RuntimeExc wrapper) for exceptions with a record-based reason.
• Adds extensive JUnit tests in ExcTest.java to validate exception properties and serialization.
• Removes the sample code and test artifacts not associated with the new functionality.

Reviewed Changes

Copilot reviewed 6 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/main/java/com/github/sttk/errs/Exc.java	Implements the core Exc exception with custom message formatting and serialization logic.
src/test/java/com/github/sttk/errs/ExcTest.java	Provides tests for constructors, getters, toString(), and serialization of Exc.
src/main/java/module-info.java	Defines module metadata for the errs package.
src/main/java/com/github/sttk/errs/package-info.java	Provides package-level documentation for the errs package.
src/test/java/SampleTest.java & src/main/java/Sample.java	Removes unused sample test and sample implementation files.

Files not reviewed (2)

• src/main/resources/META-INF/native-image/com.github.sttk/errs/serialization-config.json: Language not supported
• src/test/resources/META-INF/native-image/serialization-config.json: Language not supported

Comments suppressed due to low confidence (1)

src/test/java/com/github/sttk/errs/ExcTest.java:156

• [nitpick] Hardcoding the expected line number in the test makes it brittle; any refactoring or change in the code location could cause false negatives. Consider a more flexible approach to validate the line number, such as checking for a range or using metadata.

assertThat(exc.getLine()).isEqualTo(155);