docs,workflows: remove or update references to packages/core(-api)

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

docs/auth/oauth.md

@@ -14,7 +14,7 @@ to various third party APIs.
 There are occasions when the user wants to perform actions towards third party
 services that require authorization via OAuth. Backstage provides standardized
 [Utility APIs](../api/utility-apis.md) such as the
-[GoogleAuthApi](https://github.com/backstage/backstage/blob/master/packages/core-api/src/apis/definitions/auth.ts)
+[GoogleAuthApi](https://github.com/backstage/backstage/blob/master/packages/core-plugin-api/src/apis/definitions/auth.ts)
 for that use-case. Backstage also includes a set of implementations of these
 APIs that integrate with the
 [auth-backend](https://github.com/backstage/backstage/tree/master/plugins/auth-backend)
@@ -59,7 +59,7 @@ easier to make authenticated requests inside a plugin.
 The following describes the OAuth flow implemented by the
 [auth-backend](https://github.com/backstage/backstage/tree/master/plugins/auth-backend)
 and
-[DefaultAuthConnector](https://github.com/backstage/backstage/blob/master/packages/core-api/src/lib/AuthConnector/DefaultAuthConnector.ts)
+[DefaultAuthConnector](https://github.com/backstage/backstage/blob/master/packages/core-app-api/src/lib/AuthConnector/DefaultAuthConnector.ts)
 in `@backstage/core-api`.
 
 Component and APIs can request Access or ID Tokens from any available Auth

docs/getting-started/create-an-app.md

@@ -147,7 +147,7 @@ globs. For example:
 "packages": [
   "packages/*",
   "plugins/*",
-  "../backstage/packages/core", // New path added to work on @backstage/core
+  "../backstage/packages/core-plugin-api", // New path added to work on @backstage/core-plugin-api
 ],
 ```
 

docs/getting-started/project-structure.md

@@ -127,18 +127,17 @@ are separated out into their own folder, see further down.
   used by the backend, we chose to separate `config` and `config-loader` into
   two different packages.
 
-- [`core/`](https://github.com/backstage/backstage/tree/master/packages/core) -
+- [`core-app-api/`](https://github.com/backstage/backstage/tree/master/packages/core-app-api) -
+  This package contains the core APIs that are used to wire together Backstage
+  apps.
+
+- [`core-components/`](https://github.com/backstage/backstage/tree/master/packages/core-components) -
   This package contains our visual React components, some of which you can find
   in
   [plugin examples](https://backstage.io/storybook/?path=/story/plugins-examples--plugin-with-data).
-  Apart from that it re-exports everything from [`core-api`] so that users only
-  need to rely on one package.
 
-- [`core-api/`](https://github.com/backstage/backstage/tree/master/packages/core-api) -
-  This package contains APIs and definitions of such. It is it's own package
-  because we needed to split our `test-utils` package. It's an implementation
-  detail that we try to hide from our users, and no one should have to depend on
-  it directly.
+- [`core-plugin-api/`](https://github.com/backstage/backstage/tree/master/packages/core-plugin-api) -
+  This package contains the core APIs that are used to build Backstage plugins.
 
 - [`create-app/`](https://github.com/backstage/backstage/tree/master/packages/create-app) -
   An CLI to specifically scaffold a new Backstage App. It does so by using a

docs/overview/stability-index.md

@@ -106,16 +106,6 @@ Used to load in static configuration, mainly for use by the CLI and
 
 Stability: `1`. Mainly intended for internal use.
 
-### `core` [GitHub](https://github.com/backstage/backstage/tree/master/packages/core/)
-
-The `@backstage/core` and `@backstage/core-api` packages are being phased out
-and replaced by other `@backstage/core-*` packages. They are still in use but
-will not receive any breaking changes.
-
-### `core-api` [GitHub](https://github.com/backstage/backstage/tree/master/packages/core-api/)
-
-Stability: See `@backstage/core` above
-
 ### `core-app-api` [GitHub](https://github.com/backstage/backstage/tree/master/packages/core-app-api/)
 
 The APIs used exclusively in the app, such as `createApp` and the system icons.