chore: remove deprecated workflows:* skill aliases (#284)

* docs: capture codex skill prompt model

* fix: align codex workflow conversion

* chore: remove deprecated workflows:* skill aliases

The workflows:brainstorm, workflows:plan, workflows:work, workflows:review,
and workflows:compound aliases have been deprecated long enough. Remove them
and update skill counts (46 → 41) across plugin.json, marketplace.json,
README, and CLAUDE.md.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Trevin Chow <trevin@trevinchow.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/types/claude.ts

@@ -47,6 +47,7 @@ export type ClaudeCommand = {
 export type ClaudeSkill = {
   name: string
   description?: string
+  argumentHint?: string
   disableModelInvocation?: boolean
   sourceDir: string
   skillPath: string

src/types/codex.ts

@@ -1,4 +1,5 @@
 import type { ClaudeMcpServer } from "./claude"
+import type { CodexInvocationTargets } from "../utils/codex-content"
 
 export type CodexPrompt = {
   name: string
@@ -19,5 +20,6 @@ export type CodexBundle = {
   prompts: CodexPrompt[]
   skillDirs: CodexSkillDir[]
   generatedSkills: CodexGeneratedSkill[]
+  invocationTargets?: CodexInvocationTargets
   mcpServers?: Record<string, ClaudeMcpServer>
 }