refactor: hard-fork GSD -> MSD (Make Software Done)

Mechanical rename produced by scripts/msd-rename.cjs: gsd/Gsd/GSD -> msd/Msd/MSD
across contents and paths, upstream package/repo coordinates -> @golem15/msd-core
and golem15com/msd-core. Deep links into upstream history, sibling upstream
packages, the GSD-2 import feature, CHANGELOG.md and .changeset/ are kept as-is.

Hand edits on top: MSD block-letter banner and logos, LICENSE copyright line,
package/plugin identity, regenerated lockfile, install-tree fixtures, derived
registries and benchmark baseline; migration checksum baseline re-locked
(MSD keeps its own install state, so no install had applied the old sums);
sort-order and regex-escaped expectations in tests adjusted.

scripts/gen-test-timings.cjs

@@ -10,14 +10,14 @@
 // .test.cjs) both scored 1. This script replaces the guess with measurement.
 //
 // Input is one or more node:test reporter event streams as emitted by
-// `gsd-test` (`~/.local/state/gsd-test/runs/<run-id>/test-events-<os>-node<v>
+// `msd-test` (`~/.local/state/msd-test/runs/<run-id>/test-events-<os>-node<v>
 // .jsonl`). Each stream carries one `test:summary` event per test FILE, whose
 // `data.duration_ms` is that file's total wall-clock and whose `data.file` is
 // its absolute in-container path.
 //
 // Usage:
 //   node scripts/gen-test-timings.cjs <events.jsonl> [<events.jsonl> ...]
-//   node scripts/gen-test-timings.cjs ~/.local/state/gsd-test/runs/*/test-events-*.jsonl
+//   node scripts/gen-test-timings.cjs ~/.local/state/msd-test/runs/*/test-events-*.jsonl
 //   node scripts/gen-test-timings.cjs events.jsonl --out tests/test-timings.json
 //
 // When several streams are supplied (multiple lanes, e.g. node22 + node24), a