reobf: add string remap option

[M41G]

Adds a stringremap option for selected packages during reobfuscation.

I use this for ASM bytecode injection code that lives outside the Minecraft source classes and does not modify those classes directly. That code still carries MCP names in string literals, such as transformer owner/name/desc values or field reflection names. Normal reobfuscation remaps bytecode references, but those strings are left alone, so the transformer can stop matching once the jar is obfuscated.

This could also help other projects that keep patching logic in separate transformer packages instead of editing the decompiled Minecraft sources. It lets those packages opt in by prefix, keeps the default MCP workflow unchanged, and avoids broad string rewriting across unrelated classes.

[PhoenixVX]

Sorry for the late response, my immediate thought when I read the PR title was that this probably belongs in an RMCP plugin instead of being a default feature. I have not yet tested it to see if it functions as it should. If you have a good reason for this being in RMCP itself, I may reconsider it.

[M41G]

Sorry for the late response, my immediate thought when I read the PR title was that this probably belongs in an RMCP plugin instead of being a default feature. I have not yet tested it to see if it functions as it should. If you have a good reason for this being in RMCP itself, I may reconsider it.

I believe it belongs in RMCP because it fixes a gap in reobfuscation that I fell into, which is not a project specific workflow. RMCP already remaps bytecode references, but ASM transformers and reflection code often store class/member references as string literal. If those stay in MCP names, the jar can reobfuscate successfully but fail at runtime because the transformer no longer matches obfuscated names.

Since this is opt-in defaults off, and only applies to selected package prefixes, it should not affect the normal workflow of some developers. It just lets transformer-heavy projects get correct reobf output without needing a separate plugin.