Our predicate handler rejected any query match using a predicate or directive it did not implement. nvim-treesitter's queries use the nvim-only `#offset!` and `#make-range!` directives, so every pattern containing one silently never matched. This change implements both. `offset!` stores its range deltas in the query's pattern settings, matching nvim's semantics of adding each delta to the corresponding (row, column) range component. Injection handling in highlight.py now applies those deltas when building injected-language ranges, recomputing byte offsets from the adjusted points. This fixes injection patterns that were previously rejected outright in the vendored injections.scm files of ~19 languages, such as markdown's YAML frontmatter injection and quote-trimming injections for template strings. `make-range!` defines a named range spanning two captures. Nothing in Review Board consumes those synthetic ranges, so the handler just stops the match from being rejected. This also allows the upcoming interesting_lines.scm queries for fennel, fish, and zig to keep their directives instead of having them stripped at vendor time. Testing Done: - Added unit tests for the directive handlers and for the range adjustment math. - Added an end-to-end test verifying that markdown YAML frontmatter is highlighted as YAML, with the fence lines excluded from the injected region. - Ran unit tests.