feat(tools): added linear tools/block (#439)

* feat(linear): add Linear Issue Reader and Writer tools with types

* chore(tools): register Linear tools in global tool registry

* feat(icons): add LinearIcon for Linear block

* feat(blocks): register Linear block in global block registry

* feat(linear): implement OAuth integration for Linear block

* feat(linear): add dynamic team and project selectors for Linear block

* feat(linear): add backend API endpoints for teams and projects

* feat(linear): update UI components for Linear selectors and modal

* refactor(linear): update create/read issue tools and types

* chore(linear): update block config for Linear integration

* fix(auth): update auth and oauth logic for Linear

* minor fix

* improvement[linear]: require teamId and projectId for all tools and types

* style[lint]: fix code style and lint errors

* chore(linear): install @linear/sdk package

* fix[linear]: address greptile-apps feedback for type safety and error handling

* fix[linear]: handle teams API response errors

* modified icon, added docs

---------

Co-authored-by: sriram2k4 <sriramthehacker01@gmail.com>

package.json

@@ -27,6 +27,7 @@
     "tailwindcss": "3.4.1"
   },
   "dependencies": {
+    "@linear/sdk": "40.0.0",
     "@t3-oss/env-nextjs": "0.13.4",
     "@vercel/analytics": "1.5.0",
     "remark-gfm": "4.0.1"