test(snapshots): cover the Yarn catalog guard on vp up

Mirrors command_update_catalog_protocol_pnpm: migrate a minimal project
to the Yarn catalog layout, then `vp up vite vite-plus` must skip both
catalog-pinned names with a warning and leave package.json and the
.yarnrc.yml catalog untouched.

Author: fengmk2

crates/vp_cli_snapshots/tests/cli_snapshots/fixtures/command_update_catalog_protocol_yarn/.gitignore

@@ -0,0 +1 @@
+node_modules/

crates/vp_cli_snapshots/tests/cli_snapshots/fixtures/command_update_catalog_protocol_yarn/package.json

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+{
+  "name": "command-update-catalog-protocol-yarn",
+  "devDependencies": {
+    "vite": "^7.0.0"
+  },
+  "packageManager": "yarn@4.12.0"
+}

crates/vp_cli_snapshots/tests/cli_snapshots/fixtures/command_update_catalog_protocol_yarn/snapshots.toml

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+[[case]]
+name = "command_update_catalog_protocol_yarn"
+vp = "global"
+skip-platforms = ["windows"]
+unset-env = ["CI", "VP_SKIP_INSTALL"]
+local-registry = true
+steps = [
+  { argv = [
+    "vp",
+    "migrate",
+    "--no-interactive",
+    "--no-hooks",
+    "--package-manager",
+    "yarn",
+  ], comment = "migrate pins the toolchain through the Yarn catalog", continue-on-failure = true },
+  { argv = [
+    "vpt",
+    "print-file",
+    "package.json",
+  ], comment = "the migrated project references the catalog", continue-on-failure = true },
+  { argv = [
+    "vp",
+    "up",
+    "vite",
+    "vite-plus",
+  ], comment = "#2309 Yarn variant: `yarn up` rewrites `catalog:` specs, so catalog-pinned names are skipped", continue-on-failure = true },
+  { argv = [
+    "vpt",
+    "print-file",
+    "package.json",
+  ], comment = "`vite` and `vite-plus` stay `catalog:` instead of concrete ranges", continue-on-failure = true },
+  { argv = [
+    "vpt",
+    "print-file",
+    ".yarnrc.yml",
+  ], comment = "the catalog keeps owning the resolved toolchain version", continue-on-failure = true },
+]

crates/vp_cli_snapshots/tests/cli_snapshots/fixtures/command_update_catalog_protocol_yarn/snapshots/command_update_catalog_protocol_yarn.md

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+# command_update_catalog_protocol_yarn
+
+## `vp migrate --no-interactive --no-hooks --package-manager yarn`
+
+migrate pins the toolchain through the Yarn catalog
+
+```
+VITE+ - The Unified Toolchain for the Web
+
+⚠ Vite+ does not currently support Yarn Plug'n'Play (PnP).
+
+✔ Switched Yarn to node-modules mode
+
+Formatting code...
+
+Code formatted
+◇ Migrated . to Vite+ <version>
+• Node <version>  yarn <version>
+✓ Dependencies installed in <duration>
+• 1 config update applied
+• Package manager settings configured
+```
+
+## `vpt print-file package.json`
+
+the migrated project references the catalog
+
+```
+{
+  "name": "command-update-catalog-protocol-yarn",
+  "devDependencies": {
+    "vite": "catalog:",
+    "vite-plus": "catalog:"
+  },
+  "resolutions": {
+    "vite": "npm:@voidzero-dev/vite-plus-core@<version>"
+  },
+  "packageManager": "yarn@4.12.0"
+}
+```
+
+## `vp up vite vite-plus`
+
+#2309 Yarn variant: `yarn up` rewrites `catalog:` specs, so catalog-pinned names are skipped
+
+```
+warn: Skipped vite: the Yarn catalog pins its version, and `yarn up` would overwrite the `catalog:` reference. Edit the catalog entry in .yarnrc.yml, or run `vp migrate` when Vite+ manages the pin.
+warn: Skipped vite-plus: the Yarn catalog pins its version, and `yarn up` would overwrite the `catalog:` reference. Edit the catalog entry in .yarnrc.yml, or run `vp migrate` when Vite+ manages the pin.
+```
+
+## `vpt print-file package.json`
+
+`vite` and `vite-plus` stay `catalog:` instead of concrete ranges
+
+```
+{
+  "name": "command-update-catalog-protocol-yarn",
+  "devDependencies": {
+    "vite": "catalog:",
+    "vite-plus": "catalog:"
+  },
+  "resolutions": {
+    "vite": "npm:@voidzero-dev/vite-plus-core@<version>"
+  },
+  "packageManager": "yarn@4.12.0"
+}
+```
+
+## `vpt print-file .yarnrc.yml`
+
+the catalog keeps owning the resolved toolchain version
+
+```
+nodeLinker: node-modules
+npmPreapprovedPackages:
+  - vitest
+  - "@vitest/*"
+catalog:
+  vite: npm:@voidzero-dev/vite-plus-core@<version>
+  vite-plus: <version>
+```