docs(README.md): expand to cover the modern Coder ecosystem

[DevelopmentCats]

Summary

Expand coder/awesome-coder to cover the modern Coder ecosystem. PR #9 was scoped to hygiene and CI; this PR is the content addition that PR explicitly deferred.

Opening as draft so reviewers can sanity-check the structure, descriptions, and what made the cut before I refine.

What changed

New top-level sections

• Platform and Tools — coder/coder, coder/registry, coder/code-server (78k stars), coder/envbuilder, coder/envbox, coder/preview.
• IDE Integrations — renamed from IDEs. Adds coder/vscode-coder, coder/jetbrains-coder, coder/coder-jetbrains-toolbox alongside the existing Workspace access docs link and the private VS Code Marketplace post.
• Coder Desktop — coder/coder-desktop-macos, coder/coder-desktop-windows.
• AI Coding Agents — coder/agentapi (1.4k stars), coder.com/docs/ai-coder, and Tasks.
• Modules — pointer to registry.coder.com/modules.
• Terraform Providers — coder/terraform-provider-coder (template-side resources like coder_agent/coder_app) and coder/terraform-provider-coderd (deployment management).

Templates restructured

Split into two sub-sections under the existing Templates heading:

• On the Registry — Coder Registry templates link.
• Not on the Registry — the existing curated third-party list, alphabetized by owner.

This reflects how Coder publishes templates today while preserving every third-party repo that's still working.

Section ordering

Official Resources
Platform and Tools
IDE Integrations
Coder Desktop
AI Coding Agents
Templates
Modules
Terraform Providers
Automation
Tutorials and Blog Posts
Talks and Videos

Reading flow: what Coder is → components of Coder → how to use Coder → how to define environments → how to deploy and operate Coder → external content.

Issue template

Added the new sections to the Suggested section dropdown in .github/ISSUE_TEMPLATE/1-suggest-resource.yaml.

Out of scope (intentional)

• Tutorials and Blog Posts and Talks and Videos not expanded. Ben mentioned asking marketing for talk recommendations; treating that as a separate workstream.
• Third-party Templates not on the Registry are preserved verbatim from PR chore: refresh content and add lint + link-check workflows #9. No pruning here — that's a separate curation pass if and when you want one.
• No new entries in Automation. Validated Architectures + the GitHub Action + Lima cover the typical operator use cases.
• No Books section; still no qualifying entries.

How I verified

Same toolchain as PR #9, all green locally:

bun fmt:ci
bun x awesome-lint
typos --config .github/typos.toml
npx -y @umbrelladocs/linkspector check --showstat --check-archived -c .github/.linkspector.yml

Linkspector now sees 61 URLs (up from 39 in PR #9). 0 failed, 0 archived.

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This change was prepared by Coder Agents.

[DevelopmentCats]

This is just a first pass by agents I will be following up with Marketing for more links, posts, and videos.