Rework feedback modal (#27186)

After our last community sync, we came to the conclusion that feedback
being sent outside of email is difficult to reply to. Our decision was
to use the old, tried and true email system, so that we can better
respond to people asking questions.

<img width="392" alt="SCR-20250320-igub"
src="https://github.com/user-attachments/assets/f1d01771-30eb-4b6f-b031-c68ddaac5700"
/>

Release Notes:

- N/A

---------

Co-authored-by: Danilo Leal <daniloleal09@gmail.com>

Cargo.lock

@@ -4927,25 +4927,13 @@ dependencies = [
 name = "feedback"
 version = "0.1.0"
 dependencies = [
- "anyhow",
- "bitflags 2.8.0",
  "client",
- "db",
  "editor",
- "futures 0.3.31",
  "gpui",
- "http_client",
  "human_bytes",
- "language",
- "log",
  "menu",
- "project",
- "regex",
  "release_channel",
  "serde",
- "serde_derive",
- "serde_json",
- "smol",
  "sysinfo",
  "ui",
  "urlencoding",