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.

capabilities/mempalace/capability.json

@@ -7,7 +7,7 @@
   "tier": "full",
   "requires": [],
   "engines": {
-    "gsd": ">=1.6.0"
+    "msd": ">=1.6.0"
   },
   "runtimeCompat": {
     "supported": [
@@ -20,7 +20,7 @@
     "mempalace-capture"
   ],
   "agents": [
-    "gsd-mempalace-curator"
+    "msd-mempalace-curator"
   ],
   "hooks": [],
   "config": {
@@ -37,7 +37,7 @@
         "replace"
       ],
       "default": "augment",
-      "description": "How MemPalace relates to GSD native memory during recall/capture. 'augment' (default): the palace is an additive layer alongside .planning/graphs/ — native memory stays authoritative. 'kg_backend': knowledge-graph queries resolve against the palace's temporal KG as the primary source, with .planning/graphs/ as fallback. 'replace': recall resolves through the palace as the source of truth, native memory as fallback. Every mode stays onError:skip and default-resilient — an unreachable palace degrades to native memory, and GSD keeps writing .planning/graphs/ so no memory is lost. Cross-mode migration of existing .planning/graphs/ into the palace is a separate, not-yet-implemented concern."
+      "description": "How MemPalace relates to MSD native memory during recall/capture. 'augment' (default): the palace is an additive layer alongside .planning/graphs/ — native memory stays authoritative. 'kg_backend': knowledge-graph queries resolve against the palace's temporal KG as the primary source, with .planning/graphs/ as fallback. 'replace': recall resolves through the palace as the source of truth, native memory as fallback. Every mode stays onError:skip and default-resilient — an unreachable palace degrades to native memory, and MSD keeps writing .planning/graphs/ so no memory is lost. Cross-mode migration of existing .planning/graphs/ into the palace is a separate, not-yet-implemented concern."
     },
     "mempalace.wing": {
       "type": "string",
@@ -134,7 +134,7 @@
     {
       "point": "ship:post",
       "ref": {
-        "agent": "gsd-mempalace-curator"
+        "agent": "msd-mempalace-curator"
       },
       "produces": [],
       "consumes": [