Add .nvim.lua, an opt-in project-local Neovim configuration for
LazyVim users. It extends the runtime path with .nvim/ so the
treesitter injections ship with the repo, and wires conform to
format embedded GraphQL regions (via prettier's injected formatter)
alongside goimports/gofumpt on Go buffers.
Add .nvim/queries/go/injections.scm, which marks Go raw string
literals starting with query/mutation/subscription/fragment as
GraphQL injections, so treesitter highlighting and formatting apply
to the embedded AniList queries.
Remove .idea from .gitignore: the ignore list now deliberately
tracks project-local editor configs (.nvim.lua) instead of
editor-specific junk.