[alfaix]

Summary

Fixes CI which is broken due to multiple upstream changes in Neovim and nvim-treesitter. Supersedes #34.

What changed upstream:

• Neovim >= v0.10.4 renamed release archives from nvim-linux64.tar.gz to nvim-linux-x86_64.tar.gz
• nvim-treesitter main dropped support for Neovim < 0.12, removed TSInstallSync command, and now requires tree-sitter CLI for parser compilation
• nvim-treesitter main no longer bundles injection query files for cpp
• Neovim 0.12 changed iter_matches to return tables of nodes instead of single nodes (even with {all=false})

Changes:

• CI workflow: Archive download fallback, pin nvim-treesitter for v0.10.0, add v0.12.0 to matrix (drop v0.9.1), install tree-sitter CLI for new nvim-treesitter
• parse.lua: Handle missing injection query files gracefully; handle iter_matches returning {node} tables in Neovim 0.12+
• utils.lua: Handle schedule_notify/schedule_error when called outside coroutines
• Makefile: Pass -u minimal_init.lua to nvim for deterministic test runs
• minimal_init.lua: Add plugin lua/ dirs to package.path

Test plan

• make test passes on Neovim v0.10.0 with pinned nvim-treesitter (310f0925)
• make test passes on Neovim v0.12.0 (stable) with latest nvim-treesitter
• stylua --check passes
• CI passes on all matrix combinations (v0.10.0, v0.12.0, nightly × gtest versions)

https://claude.ai/code/session_01P5RFWJcyJGmweYnXhVvJ79