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.

docs/features/developer-profiling.md

@@ -4,7 +4,7 @@ title: Developer Profiling
 group: Infrastructure Features
 ---
 
-**Command:** `/gsd-profile-user [--questionnaire] [--refresh]`
+**Command:** `/msd-profile-user [--questionnaire] [--refresh]`
 
 **Purpose:** Analyze Claude Code session history to build behavioral profiles across 8 dimensions, generating artifacts that personalize Claude's responses to the developer's style.
 
@@ -29,7 +29,7 @@ group: Infrastructure Features
 **Pipeline Modules:**
 - `profile-pipeline.cjs` — Session scanning, message extraction, sampling
 - `profile-output.cjs` — Profile rendering, questionnaire, artifact generation
-- `gsd-user-profiler` agent — Behavioral analysis from session data
+- `msd-user-profiler` agent — Behavioral analysis from session data
 
 **Requirements:**
 - REQ-PROF-01: Session analysis MUST cover at least 8 behavioral dimensions