Remove description field from ICP create/edit form

[anujeet98]

Summary

• The "Compile from Description" flow already lives on the ICP detail page (IcpDetail.tsx's DetailsPanel), driven by the notes field, with its own "Compile Filters from Notes" action and preview/apply flow. The create/edit form drawer (IcpForm.tsx) additionally had a standalone Description editor with no compile action of its own — redundant now that the detail page covers writing/editing description content and compiling filters directly.
• Removed the Description field from the form drawer so users write/edit description content only from the ICP detail page.

Changes

• Frontend (apps/web/src/components/Icp/IcpForm.tsx):
  • Removed the Description Field/Editor block, its description state, and the description payload from both the create and update mutations.
  • Removed now-unused imports (OutputData, Editor, ensureOutputData).
• No backend changes — the description DB column/DTOs are left as-is for backward compatibility; DetailsPanel/handleCompile in IcpDetail.tsx already fall back to profile.description for any pre-existing profiles that only have legacy description content and no notes yet.

Test plan

• Verified via Playwright against the local dev server: the "Description" label/editor no longer appears in either the create dialog or the edit drawer.
• Confirmed the Details tab's Notes editor + Compile flow on the detail page is unaffected.
• tsc --noEmit passes with no errors in the changed file.

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