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.

tests/eval.property.test.cjs

@@ -3,7 +3,7 @@
 /**
  * Property-based tests for the eval scoring module (#10 / #1579).
  *
- * Module: gsd-core/bin/lib/eval.cjs
+ * Module: msd-core/bin/lib/eval.cjs
  * Exported: computeEvalScore(covered, total, infra), cmdEvalScore(cwd, args, raw)
  *
  * Properties tested:
@@ -20,7 +20,7 @@
 const { describe, test } = require('node:test');
 const assert = require('node:assert/strict');
 const fc = require('./helpers/fast-check-setup.cjs');
-const { computeEvalScore } = require('../gsd-core/bin/lib/eval.cjs');
+const { computeEvalScore } = require('../msd-core/bin/lib/eval.cjs');
 
 const INFRA_TOKENS = ['ok', 'partial', 'missing'];
 const VERDICTS = ['PRODUCTION READY', 'NEEDS WORK', 'SIGNIFICANT GAPS', 'NOT IMPLEMENTED'];