fix: refactor module layout generation to use explicit project name maps

[cdsap]

Summary

Problem

GeneratedModuleLayout reads mutable global state from NameMappings, while ProjectGenerator configures that singleton before generation. This couples module layout infrastructure to process-wide state and is unsafe when generations overlap; see ProjectGenerator.kt, NameMappings.kt, ModulesWriter.kt, and GeneratedModuleLayout.kt.

Why this matters

Concurrent or independently tested generations can observe another request's layer/module names, producing incorrect paths and package locations without a local failure.

Proposed change

Pass immutable ProjectNameMaps from ProjectWriter through AndroidModulesWriter/JvmModulesWriter and ModulesWrite into GeneratedModuleLayout.of, replacing its direct NameMappings lookups. Preserve the existing singleton for untouched generators as a follow-up boundary, without changing generated output.

Notes

This is an incremental clean-architecture boundary: immutable naming context crosses into infrastructure explicitly, while the larger singleton migration remains outside this issue.

Fixes #485

Changes

• project-generator/src/main/kotlin/io/github/cdsap/projectgenerator/generator/GeneratedModuleLayout.kt
• project-generator/src/main/kotlin/io/github/cdsap/projectgenerator/generator/classes/ClassGeneratorAndroid.kt
• project-generator/src/main/kotlin/io/github/cdsap/projectgenerator/generator/resources/ResourceGenerator.kt
• project-generator/src/main/kotlin/io/github/cdsap/projectgenerator/generator/test/TestGeneratorAndroid.kt
• project-generator/src/main/kotlin/io/github/cdsap/projectgenerator/writer/AndroidModulesWriter.kt
• project-generator/src/main/kotlin/io/github/cdsap/projectgenerator/writer/JvmModulesWriter.kt
• project-generator/src/main/kotlin/io/github/cdsap/projectgenerator/writer/ModulesWriter.kt
• project-generator/src/main/kotlin/io/github/cdsap/projectgenerator/writer/ProjectWriter.kt
• project-generator/src/test/kotlin/io/github/cdsap/projectgenerator/ProjectGeneratorTest.kt
• project-generator/src/test/kotlin/io/github/cdsap/projectgenerator/generator/GeneratedModuleLayoutTest.kt
• project-generator/src/test/kotlin/io/github/cdsap/projectgenerator/writer/ModulesWriterTest.kt

Verification

• ./gradlew :project-generator:unitTest
• ./gradlew :cli:test
• ./gradlew ktlintCheck