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.

src/config-schema.cts

@@ -1,7 +1,7 @@
 /**
  * Thin adapter — sources schema data from the manifest via the generated
  * Configuration Module. All inline literals have been removed; the manifest
- * at gsd-core/bin/shared/config-schema.manifest.json is the single source of truth.
+ * at msd-core/bin/shared/config-schema.manifest.json is the single source of truth.
  *
  * Imported by:
  *   - config.cjs (isValidConfigKey validator)
@@ -39,7 +39,7 @@ function _capabilityConfigSchema(cwd?: string): Record<string, unknown> {
       const loaderMod: { loadRegistry: (o?: Record<string, unknown>) => { configSchema?: Record<string, unknown> } } = require('./capability-loader.cjs');
       // #1459 IC-04: thread the consent home explicitly so a consented project cap's config key
       // federates at the SAME user-owned home that gated its activation.
-      const schema = loaderMod.loadRegistry({ includeInstalled: true, cwd, gsdHome: process.env['GSD_HOME'] }).configSchema;
+      const schema = loaderMod.loadRegistry({ includeInstalled: true, cwd, msdHome: process.env['MSD_HOME'] }).configSchema;
       if (schema && typeof schema === 'object') return schema;
     } catch { /* fall back to first-party */ }
   }