Barely Gravestone

Graves with your skinned head on a pike, and an Obituary to find them. One jar per loader and Minecraft version (1.20.1, 1.21.1, 26.1.2, 26.2, 26.3 on Forge and NeoForge).

Changes:

• Release workflow: if-no-files-found belongs to the artifact upload step, not the self test script
• CurseForge project id 1796268
• Self test: build its own flat platform instead of relying on world terrain (CI makes a random world)
• Antique Atlas death marker (1.21.1 and Forge 1.20.1), JourneyMap Maven risk note, docs and status
• CI: run the headless self test on the game test server (no EULA, Linux safe), drop server_check.py; self test now covers operators
• CI: no headless self test in CI (it needs a server run and therefore the Minecraft EULA, which is never accepted for anyone); server_check.py skips layers without an accepted eula.txt
• JourneyMap death markers on all builds, Open Parties and Claims and FTB Teams links, inventory resync for gone Obituaries, status and docs
• Port to 1.20.1 (Forge and NeoForge): SRG names checked, both load in real Forge 47.4.28 and NeoForge 47.1.106 installs, Forge self test 44 of 44
• Port to 1.21.1 (Forge and NeoForge): compiles with tests, NeoForge self test 44 of 44 and client tour checked
• Port to 26.2 and 26.1.2 (Forge and NeoForge): all four compile with tests
• NeoForge 26.3 layer: self test 44 of 44, client tour checked
• Add branding, README, CHANGELOG, CurseForge description, CI workflows and issue templates
• Forge 26.3 reference build: graves, Obituary, pike with skinned head