Add support for non-static Handle method

[viceroypenguin]

Fixes #224
Fixes #225
Fixes #226

[Copilot]

Pull Request Overview

This PR adds support for non-static Handle method implementations to the Immediate.Handlers library. The library previously only supported static handler methods, but now allows instance methods that can utilize dependency injection through constructor parameters.

Key changes:

• Extended the generator to detect and process both static and non-static handler methods
• Updated template generation to handle instance-based handlers with constructor injection
• Added comprehensive test coverage for the new instance method functionality

Reviewed Changes

Copilot reviewed 24 out of 28 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/Immediate.Handlers.Generators/TransformHandler.cs	Core generator logic updated to support both static and instance handler methods
src/Immediate.Handlers.Generators/Templates/Handler.sbntxt	Template modified to generate appropriate code for static vs instance handlers
src/Immediate.Handlers.Generators/Models.cs	Added IsStatic property to track handler method type
tests/Immediate.Handlers.Tests/GeneratorTests/HandlerTests.cs	Updated existing tests to cover both static and instance scenarios
tests/Immediate.Handlers.Tests/GeneratorTests/InvalidHandlerTests.cs	Added test for invalid instance handler with too many parameters
benchmarks/Benchmark.*/Benchmark.cs	Updated benchmarks to compare static vs instance handler performance

Comments suppressed due to low confidence (3)

src/Immediate.Handlers.Generators/TransformHandler.cs:26

• [nitpick] The variable name 'handleMethod' could be more descriptive. Consider renaming to 'candidateHandleMethod' or 'foundHandleMethod' to better reflect that this may be null.

		var handleMethod = symbol.GetHandleMethod();

src/Immediate.Handlers.Generators/TransformHandler.cs:161

• [nitpick] The lambda parameter 'ims' is unclear. Consider using a more descriptive name like 'method' or 'methodSymbol'.

		_ = candidates.RemoveAll(ims => !ims.IsStatic);

src/Immediate.Handlers.Generators/ImmediateHandlersGenerator.cs:126

• [nitpick] The variable name 'so' is unclear. Consider using a more descriptive name like 'scriptObject' or 'templateData'.

		var so = new ScriptObject(StringComparer.Ordinal);

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ
....Handlers.Generators/ImmediateHandlersGenerator.cs	97.81% <100.00%> (+0.12%)	⬆️
.../Immediate.Handlers.Generators/TransformHandler.cs	100.00% <100.00%> (+0.91%)	⬆️

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