refactor: remove packages/shared, deduplicate with CLI shared (#2257)

* refactor: remove packages/shared, deduplicate with packages/cli/src/shared

packages/shared duplicated packages/cli/src/shared (parse.ts, result.ts,
type-guards.ts) with the CLI never importing from the shared package.
The only consumer was .claude/skills/setup-spa, which now imports directly
from packages/cli/src/shared via relative paths.

- Delete packages/shared entirely
- Update setup-spa imports to use relative paths to CLI shared
- Remove @openrouter/spawn-shared workspace dependency from setup-spa
- Update CLAUDE.md and type-safety.md references

Agent: complexity-hunter
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

* fix: remove packages/shared from lint workflow, fix import sorting

The Biome Lint CI step referenced packages/shared/src/ which no longer
exists after this PR removes the package. Also fix import ordering in
setup-spa files to satisfy Biome's organizeImports rule.

Agent: pr-maintainer
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

* fix: address Devin review — update stale packages/shared references

- Update type-safety.md line 67: packages/shared/src/parse.ts → packages/cli/src/shared/parse.ts
- Update install.ps1 sparse-checkout: remove packages/shared reference

Agent: pr-maintainer
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

---------

Co-authored-by: B <6723574+louisgv@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

bun.lock

@@ -13,7 +13,6 @@
     ".claude/skills/setup-spa": {
       "name": "spawn-slack-bot",
       "dependencies": {
-        "@openrouter/spawn-shared": "workspace:*",
         "@slack/bolt": "4.6.0",
         "slackify-markdown": "^5.0.0",
         "valibot": "1.2.0",
@@ -21,7 +20,7 @@
     },
     "packages/cli": {
       "name": "@openrouter/spawn",
-      "version": "0.12.14",
+      "version": "0.15.3",
       "bin": {
         "spawn": "cli.js",
       },
@@ -35,13 +34,6 @@
         "@types/bun": "1.3.8",
       },
     },
-    "packages/shared": {
-      "name": "@openrouter/spawn-shared",
-      "version": "0.1.1",
-      "dependencies": {
-        "valibot": "1.2.0",
-      },
-    },
   },
   "packages": {
     "@biomejs/biome": ["@biomejs/biome@2.4.3", "", { "optionalDependencies": { "@biomejs/cli-darwin-arm64": "2.4.3", "@biomejs/cli-darwin-x64": "2.4.3", "@biomejs/cli-linux-arm64": "2.4.3", "@biomejs/cli-linux-arm64-musl": "2.4.3", "@biomejs/cli-linux-x64": "2.4.3", "@biomejs/cli-linux-x64-musl": "2.4.3", "@biomejs/cli-win32-arm64": "2.4.3", "@biomejs/cli-win32-x64": "2.4.3" }, "bin": { "biome": "bin/biome" } }, "sha512-cBrjf6PNF6yfL8+kcNl85AjiK2YHNsbU0EvDOwiZjBPbMbQ5QcgVGFpjD0O52p8nec5O8NYw7PKw3xUR7fPAkQ=="],
@@ -68,8 +60,6 @@
 
     "@openrouter/spawn": ["@openrouter/spawn@workspace:packages/cli"],
 
-    "@openrouter/spawn-shared": ["@openrouter/spawn-shared@workspace:packages/shared"],
-
     "@slack/bolt": ["@slack/bolt@4.6.0", "", { "dependencies": { "@slack/logger": "^4.0.0", "@slack/oauth": "^3.0.4", "@slack/socket-mode": "^2.0.5", "@slack/types": "^2.18.0", "@slack/web-api": "^7.12.0", "axios": "^1.12.0", "express": "^5.0.0", "path-to-regexp": "^8.1.0", "raw-body": "^3", "tsscmp": "^1.0.6" }, "peerDependencies": { "@types/express": "^5.0.0" } }, "sha512-xPgfUs2+OXSugz54Ky07pA890+Qydk22SYToi8uGpXeHSt1JWwFJkRyd/9Vlg5I1AdfdpGXExDpwnbuN9Q/2dQ=="],
 
     "@slack/logger": ["@slack/logger@4.0.0", "", { "dependencies": { "@types/node": ">=18.0.0" } }, "sha512-Wz7QYfPAlG/DR+DfABddUZeNgoeY7d1J39OCR2jR+v7VBsB8ezulDK5szTnDDPDwLH5IWhLvXIHlCFZV7MSKgA=="],