Apply values from gradle.properties

[isXander]

This PR allows you to configure all static modstitch properties from gradle.properties.

Closes #13

The property keys mirror that of the code path.
E.g.,

modstitch {
  minecraftVersion = "1.21.8"
}

could become

modstitch.minecraftVersion=1.21.8

Modstitch searches for values deep within the project tree, meaning it will search through parents' properties too.

Extra considerations

Cousin problem

Modstitch is commonly used with tools like Stonecutter. In Stonecutter, the project structure looks like this.

:core:1.21.8
:extra:1.21.8

This means the 1.21.8 projects are cousins, not direct parent/child. This means that when configuring :extra:1.21.8, :core:1.21.8's gradle properties are not sourced, which makes sense.

Controlify, my mod, does this exact thing, which would limit the usefulness of this PR, feedback is appreciated.

Bypass of intellisense

This makes errors a lot more tricky. If Modstitch had an update and changed/removed/renamed a property within its extension, there would be no highlighted error within the properties file, potentially leading to confusion, and tricky errors.

[Copilot]

Pull Request Overview

This PR adds support for configuring Modstitch properties through gradle.properties files instead of only through the Gradle build script DSL. Properties are searched deeply through the project hierarchy, allowing parent project properties to be inherited by child projects.

Key changes:

• Implements deep property searching through project tree hierarchy
• Adds property assignment utilities with null-safe operations
• Refactors extension initialization to apply properties before user configuration

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/main/kotlin/dev/isxander/modstitch/util/ProjectUtils.kt	Adds utility functions for deep gradle property searching and null-safe property assignment
src/main/kotlin/dev/isxander/modstitch/base/BaseCommonImpl.kt	Implements property application logic and reorders initialization to apply properties before plugins
src/main/kotlin/dev/isxander/modstitch/base/loom/BaseLoomImpl.kt	Adds Fabric-specific property application for fabricLoaderVersion
src/main/kotlin/dev/isxander/modstitch/base/moddevgradle/BaseModDevGradleImpl.kt	Adds NeoForge/Forge-specific property application for version configurations
test-project/build.gradle.kts	Removes hardcoded configuration, demonstrating properties-based setup
test-project/gradle.properties	Adds modstitch properties for metadata and mixin configuration
test-project/fabric/gradle.properties	Converts platform-specific properties to modstitch namespace
test-project/forge/gradle.properties	Converts platform-specific properties to modstitch namespace
test-project/neoforge/gradle.properties	Converts platform-specific properties to modstitch namespace