feat(cli): add interactive install command

Related to #153

Co-authored-by: Taegeon Alan Go <32065632+gtg7784@users.noreply.github.com>

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/cli/index.ts

@@ -0,0 +1,54 @@
+#!/usr/bin/env bun
+import { Command } from "commander"
+import { install } from "./install"
+import type { InstallArgs } from "./types"
+
+const packageJson = await import("../../package.json")
+const VERSION = packageJson.version
+
+const program = new Command()
+
+program
+  .name("oh-my-opencode")
+  .description("The ultimate OpenCode plugin - multi-model orchestration, LSP tools, and more")
+  .version(VERSION, "-v, --version", "Show version number")
+
+program
+  .command("install")
+  .description("Install and configure oh-my-opencode with interactive setup")
+  .option("--no-tui", "Run in non-interactive mode (requires all options)")
+  .option("--claude <value>", "Claude subscription: no, yes, max20")
+  .option("--chatgpt <value>", "ChatGPT subscription: no, yes")
+  .option("--gemini <value>", "Gemini integration: no, yes")
+  .option("--skip-auth", "Skip authentication setup hints")
+  .addHelpText("after", `
+Examples:
+  $ bunx oh-my-opencode install
+  $ bunx oh-my-opencode install --no-tui --claude=max20 --chatgpt=yes --gemini=yes
+  $ bunx oh-my-opencode install --no-tui --claude=no --chatgpt=no --gemini=no
+
+Model Providers:
+  Claude      Required for Sisyphus (main orchestrator) and Librarian agents
+  ChatGPT     Powers the Oracle agent for debugging and architecture
+  Gemini      Powers frontend, documentation, and multimodal agents
+`)
+  .action(async (options) => {
+    const args: InstallArgs = {
+      tui: options.tui !== false,
+      claude: options.claude,
+      chatgpt: options.chatgpt,
+      gemini: options.gemini,
+      skipAuth: options.skipAuth ?? false,
+    }
+    const exitCode = await install(args)
+    process.exit(exitCode)
+  })
+
+program
+  .command("version")
+  .description("Show version information")
+  .action(() => {
+    console.log(`oh-my-opencode v${VERSION}`)
+  })
+
+program.parse()