[thekevinbot]

Fixes #1259

Retargeted to main after the #1258 stack merged.

What

• New docs/reference/glob.md: why bash globstar, a fixture tree, a conformance table, the divergences with reasons, anchoring, edge cases. Linked from the sidebar, path-tables.md and config.md (whose glob-rule text now points at it).
• packages/rust/tests/glob_conformance.rs parses the fixture and table out of glob.md and runs every row as a path-table (real dirsql binary, HOME set for ~/) and, minus the leading ./, as a config glob. The page is the data, so it cannot drift.
• scripts/glob-conformance.sh check runs the same rows through bash -O globstar -O nullglob (dotglob off). Rows with no divergence tag must equal bash's output after three filters, one per divergence (files only, node_modules unless spelled, gitignored *.log). A tagged row must differ from raw bash, so a stale tag fails. CI never calls bash.
• No existing test compared against bash; config_glob_parity.rs only compares the two dirsql surfaces, so this is a new file.

Red / green

Red run 37418784848: glob_conformance failed on ./[z.md and ./**/.*, behavior absent from the base then. Both are on main now; the test passes here.

E2E Verification

Docs and a test only; no packages/rust/src change, so no receipts. cargo test -p dirsql --features cli --test glob_conformance and scripts/glob-conformance.sh check were run. pnpm build in docs/ is clean.