Add Zed IDE module

Adds a new official module for Zed IDE integration with Coder workspaces.
The module provides a one-click button to open workspaces in Zed IDE
using the zed:// protocol.

Features:
- Configurable folder path
- Customizable display name and order
- Support for app grouping
- External app integration

Co-authored-by: matifali <[email protected]>

Author: blink-so[bot]

registry/coder/modules/zed/README.md

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+---
+display_name: Zed IDE
+description: Add a one-click button to launch Zed IDE
+icon: ../../../../.icons/zed.svg
+maintainer_github: coder
+verified: true
+tags: [ide, zed, editor]
+---
+
+# Zed IDE
+
+Add a button to open any workspace with a single click in Zed IDE.
+
+Zed is a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.
+
+```tf
+module "zed" {
+  count    = data.coder_workspace.me.start_count
+  source   = "registry.coder.com/coder/zed/coder"
+  version  = "1.0.0"
+  agent_id = coder_agent.example.id
+}
+```
+
+## Examples
+
+### Open in a specific directory
+
+```tf
+module "zed" {
+  count    = data.coder_workspace.me.start_count
+  source   = "registry.coder.com/coder/zed/coder"
+  version  = "1.0.0"
+  agent_id = coder_agent.example.id
+  folder   = "/home/coder/project"
+}
+```
+
+### Custom display name and order
+
+```tf
+module "zed" {
+  count        = data.coder_workspace.me.start_count
+  source       = "registry.coder.com/coder/zed/coder"
+  version      = "1.0.0"
+  agent_id     = coder_agent.example.id
+  display_name = "Zed Editor"
+  order        = 1
+}
+```

registry/coder/modules/zed/main.test.ts

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+import { describe, expect, it } from "bun:test";
+import {
+  runTerraformApply,
+  runTerraformInit,
+  testRequiredVariables,
+} from "~test";
+
+describe("zed", async () => {
+  await runTerraformInit(import.meta.dir);
+
+  testRequiredVariables(import.meta.dir, {
+    agent_id: "foo",
+  });
+
+  it("default output", async () => {
+    const state = await runTerraformApply(import.meta.dir, {
+      agent_id: "foo",
+    });
+    expect(state.outputs.zed_url.value).toBe(
+      "zed://ssh/default.default.coder/",
+    );
+
+    const coder_app = state.resources.find(
+      (res) => res.type === "coder_app" && res.name === "zed",
+    );
+
+    expect(coder_app).not.toBeNull();
+    expect(coder_app?.instances.length).toBe(1);
+    expect(coder_app?.instances[0].attributes.order).toBeNull();
+  });
+
+  it("adds folder", async () => {
+    const state = await runTerraformApply(import.meta.dir, {
+      agent_id: "foo",
+      folder: "/foo/bar",
+    });
+    expect(state.outputs.zed_url.value).toBe(
+      "zed://ssh/default.default.coder/foo/bar",
+    );
+  });
+
+  it("expect order to be set", async () => {
+    const state = await runTerraformApply(import.meta.dir, {
+      agent_id: "foo",
+      order: "22",
+    });
+
+    const coder_app = state.resources.find(
+      (res) => res.type === "coder_app" && res.name === "zed",
+    );
+
+    expect(coder_app).not.toBeNull();
+    expect(coder_app?.instances.length).toBe(1);
+    expect(coder_app?.instances[0].attributes.order).toBe(22);
+  });
+
+  it("expect display_name to be set", async () => {
+    const state = await runTerraformApply(import.meta.dir, {
+      agent_id: "foo",
+      display_name: "Custom Zed",
+    });
+
+    const coder_app = state.resources.find(
+      (res) => res.type === "coder_app" && res.name === "zed",
+    );
+
+    expect(coder_app).not.toBeNull();
+    expect(coder_app?.instances.length).toBe(1);
+    expect(coder_app?.instances[0].attributes.display_name).toBe("Custom Zed");
+  });
+});

registry/coder/modules/zed/main.tf

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+terraform {
+  required_version = ">= 1.0"
+
+  required_providers {
+    coder = {
+      source  = "coder/coder"
+      version = ">= 2.5"
+    }
+  }
+}
+
+variable "agent_id" {
+  type        = string
+  description = "The ID of a Coder agent."
+}
+
+variable "folder" {
+  type        = string
+  description = "The folder to open in Zed IDE."
+  default     = ""
+}
+
+variable "order" {
+  type        = number
+  description = "The order determines the position of app in the UI presentation. The lowest order is shown first and apps with equal order are sorted by name (ascending order)."
+  default     = null
+}
+
+variable "group" {
+  type        = string
+  description = "The name of a group that this app belongs to."
+  default     = null
+}
+
+variable "slug" {
+  type        = string
+  description = "The slug of the app."
+  default     = "zed"
+}
+
+variable "display_name" {
+  type        = string
+  description = "The display name of the app."
+  default     = "Zed IDE"
+}
+
+data "coder_workspace" "me" {}
+data "coder_workspace_owner" "me" {}
+
+locals {
+  workspace_name = lower(data.coder_workspace.me.name)
+  owner_name     = lower(data.coder_workspace_owner.me.name)
+  hostname       = "${local.workspace_name}.${local.owner_name}.coder"
+}
+
+resource "coder_app" "zed" {
+  agent_id     = var.agent_id
+  display_name = var.display_name
+  slug         = var.slug
+  icon         = "/icon/zed.svg"
+  external     = true
+  order        = var.order
+  group        = var.group
+  url          = "zed://ssh/${local.hostname}/${var.folder}"
+}
+
+output "zed_url" {
+  value       = coder_app.zed.url
+  description = "Zed IDE URL."
+}