Frontend uudelleenrakennettu: Astro-komponentit, Wasm pääsäikeessä, ei Workeria

Vanha frontend siirretty temp/. Uusi rakenne:
- StatusBar.astro, Terminal.astro, Editor.astro, Guide.astro
- global.css erillinen
- Wasm pääsäikeessä (ei Worker — yksinkertainen, debugattava)
- Tab-completion, dropdown, projektikortti, Monaco, GUIDE.md
- Ei tokenisointia eikä koodilaboratoriota

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

network-poc/temp/frontend-old/public/docs/README.md

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+# OpenTofu Core Codebase Documentation
+
+This directory contains some documentation about the OpenTofu Core codebase,
+aimed at readers who are interested in making code contributions.
+
+If you're looking for information on _using_ OpenTofu, please instead refer
+to [the main OpenTofu CLI documentation](https://opentofu.org/docs/cli/index.html).
+
+## OpenTofu Core Architecture Documents
+
+* [OpenTofu Core Architecture Summary](./architecture.md): an overview of the
+  main components of OpenTofu Core and how they interact. This is the best
+  starting point if you are diving in to this codebase for the first time.
+
+* [Resource Instance Change Lifecycle](./resource-instance-change-lifecycle.md):
+  a description of the steps in validating, planning, and applying a change
+  to a resource instance, from the perspective of the provider plugin RPC
+  operations. This may be useful for understanding the various expectations
+  OpenTofu enforces about provider behavior, either if you intend to make
+  changes to those behaviors or if you are implementing a new OpenTofu plugin
+  SDK and so wish to conform to them.
+
+  (If you are planning to write a new provider using the _official_ SDK then
+  please refer to [the Extend documentation](https://github.com/hashicorp/terraform-docs-common)
+  instead; it presents similar information from the perspective of the SDK
+  API, rather than the plugin wire protocol.)
+
+* [Diagnostics](./diagnostics): how we report errors and warnings to end-users
+  in OpenTofu.
+
+* [Plugin Protocol](./plugin-protocol/): gRPC/protobuf definitions for the
+  plugin wire protocol and information about its versioning strategy.
+
+  This documentation is for SDK developers, and is not necessary reading for
+  those implementing a provider using the official SDK.
+
+* [How OpenTofu Uses Unicode](./unicode.md): an overview of the various
+  features of OpenTofu that rely on Unicode and how to change those features
+  to adopt new versions of Unicode.
+
+## Contribution Guides
+
+* [Contributing to OpenTofu](../CONTRIBUTING.md): a complete guideline for those who want to contribute to this project.