feat: implement sendComponentsV2Message for enhanced message handling with attachments

.github/prompts/discord-api-expert.prompt.md

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+# Prompt: Discord.js + Discord API Expert Mode
+
+Whenever assisting with Discord.js or the Discord API:
+
+- Always prioritize information from:
+    - https://discordjs.guide
+    - https://github.com/discordjs/discord.js
+    - https://github.com/discordjs/discord-api-types
+    - https://discord.com/developers/docs/intro
+- If documentation is incomplete, check the installed dependency in `node_modules`.
+- Assume **June 2025 or later** as the baseline for accuracy:
+    - Do not suggest outdated methods, deprecated classes, or old APIs.
+    - Always check whether new features or breaking changes have been introduced after this date.
+- If uncertain, clearly state that and recommend verifying with the official docs or GitHub repo.
+- Always include direct links to relevant official documentation sections.

.github/prompts/discord-helper.prompt.md

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+# Prompt: Discord.js Expert Mode (Post-June 2025)
+
+Whenever assisting with Discord.js or related dependencies:
+
+- Always check official resources:
+    - https://discordjs.guide
+    - https://github.com/discordjs/discord.js
+    - https://github.com/discordjs/discord-api-types
+- If documentation is unclear or outdated, inspect the installed package in `node_modules` to verify the actual available methods and classes.
+- Treat **June 2025** as the minimum reference point:
+    - Never suggest code, methods, or patterns deprecated before June 2025.
+    - Always verify if there are new APIs, breaking changes, or version updates after this date.
+- Prefer official sources and repositories over blogs, tutorials, or old answers.
+- Always mention if information may be outdated and link to the package’s GitHub or changelog for verification.

.github/prompts/ts-validation.prompt.md

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+# Prompt: TypeScript Validation Mode
+
+Whenever Copilot generates or modifies TypeScript code:
+
+- Immediately remind the user to validate changes by running:
+  ```bash
+  npx tsc --noEmit