[1.20.4] Feat: Dynamic class remapping

[emyfops]

This pull requests implements a brand new dynamic class remapping that uses the existing dynamic reflection serializer
It allows reflection of obfuscated minecraft members for the packet logger module

Mappings are downloaded from our cloudflare bucket at mappings.lambda-client.org and are stored loosely in the cache folder

Before:

net.minecraft.class_2672
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field_34864: [B@62e634ff
field_34865: []
field_34871: net.minecraft.class_6606@703b0ecd
net.minecraft.class_6606
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field_34875: {0, 1, 5, 6, 7, 8, 9, 10}
field_34876: {0, 1, 5, 6, 7, 8, 10, 12, 13, 14}
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field_34878: [[B@67926d69, [B@5b3a5fa0, [B@2d3ba9fd, [B@6f398cb7, [B@1bb44d1c]

After:

ChunkDataS2CPacket
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chunkData: ChunkData@349c0420
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sectionsData: [B@1acfdb99
blockEntities: []
lightData: LightData@37f330be
LightData
initedSky: {2, 10, 11, 12, 13}
initedBlock: {2, 3, 4, 10}
uninitedSky: {0, 1, 3, 4, 5, 6, 7, 8, 9}
uninitedBlock: {0, 1, 5, 6, 7, 8, 9, 11, 12, 13}
skyNibbles: [[B@5e55fb7b, [B@3aa2f03b, [B@37a46db0, [B@197ccd3a, [B@6803634d]
blockNibbles: [[B@458d755e, [B@51d059b2, [B@2e3a4baf, [B@5dd05c2e]

This pull request also revamps the file utilities with a more streamlined and functional approach
Examples:

File("...")
.downloadCompare(url ="...", 1) // Download if remote is larger than localFile("...")
.downloadIfNotPresent(url ="...") { header("key", "value") } // Create the file and download the content to it; Modify the http request before posting

[Copilot]

Pull Request Overview

This PR implements dynamic class remapping using existing dynamic reflection serialization while refactoring several file utilities and network endpoints to improve consistency and functionality.

• Removed deprecated contracts and unused file utility functions from various extensions.
• Integrated asynchronous mapping downloads with dynamic remapping support and updated endpoint documentation.
• Updated file path handling in modules to use a new relativeMCPath extension and improved download handling in the HTTP client.

Reviewed Changes

Copilot reviewed 16 out of 17 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
common/src/main/kotlin/com/lambda/util/extension/Other.kt	Removed experimental contracts imports.
common/src/main/kotlin/com/lambda/util/FolderRegister.kt	Removed deprecated file utility functions and added a relativeMCPath extension.
common/src/main/kotlin/com/lambda/util/FileUtils.kt	Introduced streamlined file download and utility functions.
common/src/main/kotlin/com/lambda/util/DynamicReflectionSerializer.kt	Added dynamic remapping support using asynchronously downloaded mappings and a configurable remap flag.
common/src/main/kotlin/com/lambda/util/DynamicException.kt	Implemented DynamicException to remap stack traces based on deobfuscated names.
common/src/main/kotlin/com/lambda/network/api/v1/endpoints/*.kt	Updated endpoint documentation to clarify return types.
common/src/main/kotlin/com/lambda/network/LambdaHttp.kt	Enhanced download functions with response status checks before writing content.
common/src/main/kotlin/com/lambda/module/modules/*	Adjusted file path references from relativePath to relativeMCPath for improved file handling.
common/src/main/java/com/lambda/mixin/CrashReportMixin.java	Added mixin modifications to adjust crash reporting and inject dynamic exception handling.

Files not reviewed (1)

• common/src/main/resources/lambda.mixins.common.json: Language not supported

[Copilot]

Using runBlocking in the object initializer for mapping downloads can lead to performance issues during startup. Consider lazy initialization or an asynchronous approach to avoid blocking the main thread.

Suggested change

	privateval mappings = runBlocking {
	"${Network.mappings}/${Network.gameVersion}"
	.downloadIfNotPresent(cache.resolveFile(Network.gameVersion))
	.map { file ->
	file.readLines()
	.map { it.split('') }
	.associate { it[0].split('$').last() to it[1] }
	}
	.getOrElse {
	LOG.error("Unable to download deobfuscated qualifiers", it)
	emptyMap()
	}
	privateval mappings by lazy {
	runCatching {
	"${Network.mappings}/${Network.gameVersion}"
	.downloadIfNotPresent(cache.resolveFile(Network.gameVersion))
	.map { file ->
	file.readLines()
	.map { it.split('') }
	.associate { it[0].split('$').last() to it[1] }
	}
	.getOrElse {
	LOG.error("Unable to download deobfuscated qualifiers", it)
	emptyMap()
	}
	}.getOrElse {
	LOG.error("Error initializing mappings", it)
	emptyMap()
	}