LocateNext 1.1.0

Adds 1.21.11, 26.1.2 and 26.2 alongside 1.21.1. One source tree, one jar per version.

• Persistence now uses a single Codec shared by every version, replacing the hand-rolled NBT.
  26.1 dropped SavedData's tag methods entirely in favour of a Codec, and keeping two
  serializations in step would have been a standing source of save-format drift. Existing saves
  are unaffected — the field names and encoding are unchanged, verified by loading a
  pre-1.1.0 world.
• Mod Menu integration is 1.21.1-only for now: its newer artifacts still carry intermediary
  references that Loom will not remap against an un-obfuscated Minecraft. Everything else works
  on every version.

Known gap: 1.21.1 and 1.21.11 were tested in-game end to end. 26.1.2 and 26.2 are verified to
build and boot with the mod loaded, but nothing beyond that — no bot speaks those protocols yet.