Merge branch 'backstage:master' into core-components-docs-update

.changeset/cyan-seahorses-film.md

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+---
+'@backstage/core-plugin-api': minor
+---
+
+**BREAKING CHANGE** The `StorageApi` has received several updates that fills in gaps for some use-cases and makes it easier to avoid mistakes:
+
+- The `StorageValueChange` type has been renamed to `StorageValueSnapshot`, the `newValue` property has been renamed to `value`, the stored value type has been narrowed to `JsonValue`, and it has received a new `presence` property that is `'unknown'`, `'absent'`, or `'present'`.
+- The `get` method has been deprecated in favor of a new `snapshot` method, which returns a `StorageValueSnapshot`.
+- The `observe$` method has had its contract changed. It should now emit values when the `presence` of a key changes, this may for example happen when remotely stored values are requested on page load and the presence switches from `'unknown'` to either `'absent'` or `'present'`.
+
+The above changes have been made with deprecations in place to maintain much of the backwards compatibility for consumers of the `StorageApi`. The only breaking change is the narrowing of the stored value type, which may in some cases require the addition of an explicit type parameter to the `get` and `observe$` methods.

.changeset/expor-k8s-backend-client.md

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+---
+'@backstage/plugin-kubernetes': minor
+---
+
+Includes `KubernetesBackendClient` in the export to allow developers to use it externally.

.changeset/gorgeous-beers-teach.md

@@ -0,0 +1,5 @@
+---
+'@backstage/core-app-api': minor
+---
+
+Updated `WebStorageApi` to reflect the `StorageApi` changes in `@backstage/core-plugin-api`.

.changeset/green-timers-film.md

@@ -0,0 +1,5 @@
+---
+'@backstage/test-utils': minor
+---
+
+Updated `MockStorageApi` to reflect the `StorageApi` changes in `@backstage/core-plugin-api`.

.changeset/modern-planets-fry.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-newrelic-dashboard': patch
+---
+
+Created a New Plugin , which imports dashboard links and snapshots from New Relic

.changeset/moody-scissors-yell.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-home': patch
+---
+
+Fix undefined identity bug in `WelcomeTitle` caused by using deprecated methods of the IdentityApi

.changeset/nice-feet-hope.md

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+---
+'@backstage/create-app': patch
+---
+
+The `index.html` template of the app has been updated to use the new `config` global provided by the Backstage CLI.
+
+To apply this change to an existing app, make the following changes to `packages/app/public/index.html`:
+
+```diff
+-    <title><%= app.title %></title>
++    <title><%= config.getString('app.title') %></title>
+```
+
+```diff
+-    <% if (app.googleAnalyticsTrackingId && typeof app.googleAnalyticsTrackingId === 'string') { %>
++    <% if (config.has('app.googleAnalyticsTrackingId')) { %>
+     <script
+       async
+-      src="https://www.googletagmanager.com/gtag/js?id=<%= app.googleAnalyticsTrackingId %>"
++      src="https://www.googletagmanager.com/gtag/js?id=<%= config.getString('app.googleAnalyticsTrackingId') %>"
+     ></script>
+```
+
+```diff
+-      gtag('config', '<%= app.googleAnalyticsTrackingId %>');
++      gtag(
++        'config',
++        '<%= config.getString("app.googleAnalyticsTrackingId") %>',
++      );
+```

.changeset/purple-grapes-kick.md

@@ -0,0 +1,15 @@
+---
+'@backstage/cli': patch
+---
+
+The frontend configuration is now available as a `config` global during templating of the `index.html` file. This allows for much more flexibility as the values available during templating is not longer hardcoded to a fixed set of values.
+
+For example, to access the app title, you would now do the following:
+
+```html
+<title><%= config.getString('app.title') %></title>
+```
+
+Along with this change, usage of the existing `app.<key>` values has been deprecated and will be removed in a future release. The general pattern for migrating existing usage is to replace `<%= app.<key> %>` with `<%= config.getString('app.<key>') %>`, although in some cases you may need to use for example `config.has('app.<key>')` or `config.getOptionalString('app.<key>')` instead.
+
+The [`@backstage/create-app` changelog](https://github.com/backstage/backstage/blob/master/packages/create-app/CHANGELOG.md#049) also contains more details how to migrate existing usage.

.changeset/smooth-news-melt.md

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+---
+'@backstage/core-components': patch
+---
+
+Do not `setState` when unmounted in `OverflowTooltip`

.changeset/soft-scissors-own.md

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+---
+'embedded-techdocs-app': patch
+---
+
+The `index.html` template was updated to use the new `config` global.

.changeset/techdocs-sakta-vi-gar.md

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+---
+'@backstage/plugin-techdocs-backend': patch
+---
+
+Fixed a bug preventing cache from being enabled in TechDocs "recommended" deployment mode.

.changeset/unlucky-wolves-reply.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-scaffolder': patch
+---
+
+Add DescriptionField override to support Markdown