docs: add API documentation for Coder plugin (#15)

* docs: finish drafts for hooks/types README files

* wip: add stub for components README

* fix: remove typo in main docs

* wip: add stub for component docs

* wip: add outline for component documentation

* docs: add documentation for CoderAuthWrapper and CoderErrorBoundary

* docs: finish up section for CoderProvider

* fix: update typo in library name

* docs: finish section for CoderAppConfig

* fix: export useWorkspacesCardContext

* docs: finish section for useWorkspacesCardContext

* wip: add stubs for CoderWorkspacesCard

* fix: update link in main directory README

* docs: add more info to component docs

* fix: ensure link configs are combined properly

* docs: finish docs for CreateWorkspacesLink

* docs: finish section for ExtraActionsButton

* docs: finish section for HeaderRow

* docs: finish Root

* docs: finish section for SearchBox

* docs: finish rough draft of API docs

* fix: fill in missing section for CoderProvider

* chore: move API docs up one level

* docs: fill in link for TODO comment

* fix: reword docs message for clarity

* Update plugins/backstage-plugin-coder/docs/README.md

Co-authored-by: Ben Potter <me@bpmct.net>

* fix: update version for Coder plugin

* docs: add info about useCoderEntityConfig

* fix: make sure all exported components have unique name values

* fix: make sure all values are properly exported at top-level plugin root

* fix: remove forwardRef from exported sub-components

* fix: remove forwardRef from Root

---------

Co-authored-by: Ben Potter <me@bpmct.net>

Author: Parkreiner

plugins/backstage-plugin-coder/README.md

@@ -89,7 +89,7 @@ the devcontainer.
    );
    ```
 
-   <!-- > Note: You can also wrap a single page or component with `CoderProvider` if you only need Coder in a specific part of your app. See our [API reference](#TODO) for more details. -->
+   **Note:** You can also wrap a single page or component with `CoderProvider` if you only need Coder in a specific part of your app. See our [API reference](./docs/README.md) (particularly the section on [the `CoderProvider` component](./docs/components.md#coderprovider)) for more details.
 
 1. Add the `CoderWorkspacesCard` card to the entity page in your app:
 

plugins/backstage-plugin-coder/docs/README.md

@@ -0,0 +1,9 @@
+# Plugin API Reference – Coder for Backstage
+
+For users who need more information about how to extend and modify the Coder plugin. For general setup, please see our main [README](../README.md).
+
+## Documentation directory
+
+- [Components](./components.md)
+- [Custom React hooks](./hooks.md)
+- [Important types](./types.md)