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.

.github/PULL_REQUEST_TEMPLATE/registry-entry.md

@@ -30,7 +30,7 @@ Full schema and process: [docs/registries/README.md](../../docs/registries/READM
   "description": "",
   "author": "",
   "license": "",
-  "enginesGsd": "",
+  "enginesMsd": "",
   "install": "",
   "uninstall": "",
   "interactions": {},
@@ -42,7 +42,7 @@ Full schema and process: [docs/registries/README.md](../../docs/registries/READM
 
 ## Required-field checklist
 
-- [ ] `id`, `name`, `type`, `repo`, `description`, `author`, `license`, `enginesGsd`, `install`, `uninstall`, `interactions`, `discussion` are all present and non-empty
+- [ ] `id`, `name`, `type`, `repo`, `description`, `author`, `license`, `enginesMsd`, `install`, `uninstall`, `interactions`, `discussion` are all present and non-empty
 - [ ] **(Capability entries only)** `interactions.loopExtensionPoints` is a non-empty subset of the 12 Loop Extension Points, `interactions.hookKinds` ⊆ `{step, contribution, gate}`, and `interactions.configKeys` / `requires` / `runtimeCompat` / `produces` / `consumes` are present (empty arrays are fine where nothing applies)
 - [ ] **(EoS entries only)** `protocolVersion` is an integer ≥ 1, `interactions.interfacePoints` is a non-empty subset of the six interface points, `interactions.profile` is one of `programmatic-cli` / `declarative-cli` / `ide`, and `interactions.axes` has exactly the eight required axis keys plus, optionally, `effortSurface` (`argv` / `none`)
 - [ ] **(Reviewer entries only)** `interactions.slug` matches the lane slug grammar `^[a-z0-9][a-z0-9_-]*$`, `interactions.flags` is a non-empty array matching `^--[a-z0-9][a-z0-9-]*$`, `interactions.transport` is `spawn` or `openai-http`, `interactions.evidenceClass` is `source-grounded` or `diff-only`, `interactions.reviewsSection` is a non-empty string (max 200 characters), and `interactions.requiresBinaries` / `configKeys` / `runtimeCompat` are present (empty arrays are fine where nothing applies)
@@ -50,7 +50,7 @@ Full schema and process: [docs/registries/README.md](../../docs/registries/READM
 ## Ownership & non-endorsement
 
 - [ ] `repo` links to a repository **I own or am the primary maintainer of** — not a fork, mirror, or someone else's project
-- [ ] I understand that inclusion in this registry means only that a maintainer merged this PR — it is **not** an endorsement, and GSD has not reviewed, tested, audited, or verified my solution or its claimed GSD interactions
+- [ ] I understand that inclusion in this registry means only that a maintainer merged this PR — it is **not** an endorsement, and MSD has not reviewed, tested, audited, or verified my solution or its claimed MSD interactions
 - [ ] I understand this entry is removed only for illegal content, malware, spam, or a dead/non-functional link — never for quality — and a maintainer may remove it on that narrow basis without further notice
 
 ## One entry, one PR
@@ -86,13 +86,13 @@ Full schema and process: [docs/registries/README.md](../../docs/registries/READM
   "id": "linear-issue-sync",
   "name": "Linear Issue Sync",
   "type": "capability",
-  "repo": "some-org/gsd-cap-linear-sync",
+  "repo": "some-org/msd-cap-linear-sync",
   "description": "Mirrors ROADMAP.md items to Linear issues as a ship:post contribution.",
   "author": "Some Org <hello@some-org.example>",
   "license": "MIT",
-  "enginesGsd": ">=1.6.0",
-  "install": "gsd capability install https://github.com/some-org/gsd-cap-linear-sync.git#v1.0.0",
-  "uninstall": "gsd capability remove linear-issue-sync",
+  "enginesMsd": ">=1.6.0",
+  "install": "msd capability install https://github.com/some-org/msd-cap-linear-sync.git#v1.0.0",
+  "uninstall": "msd capability remove linear-issue-sync",
   "interactions": {
     "loopExtensionPoints": ["ship:post"],
     "hookKinds": ["contribution"],