Build template decoder

Paste an in-game chat link. The decoder reads profession, specializations, trait picks and skill palette IDs. Named records link through; everything else stays a labelled ID.

Example codes

[&DQYfLSkaOCcXAXQANRfLAL4BjwBOARwBlwCWAAAAAAAAAAAAAAAAAAAAAAA=]
Elementalist / Weaver — @gw2/chatlink decode fixture (legacy, no weapon array)
[&DQQhNx4XNy4uFyUPvgC9ALoAvADpFpYBLhaXAQEECxMAAAAAAAAAAAAAAAAAAA==]
Ranger / Soulbeast — @gw2/chatlink decode fixture (legacy, with pets)
[&DQEQOQ02GzkBAAAAAgAAAAMAAAAEAAAABQAAAAAAAAAAAAAAAAAAAAAAAAA=]
Guardian / Dragonhunter — generated from the format spec and round-tripped