Plugins: Extend panel menu with commands from plugins (#63802)

* feat(plugins): introduce dashboard panel menu placement for adding menu items

* test: add test for getPanelMenu()

* added an unique identifier for each extension.

* added context to getPluginExtensions.

* wip

* Wip

* wiwip

* Wip

* feat: WWWIIIIPPPP 🧨

* Wip

* Renamed some of the types to align a bit better.

* added limit to how many extensions a plugin can register per placement.

* decreased number of items to 2

* will trim the lenght of titles to max 25 chars.

* wrapping configure function with error handling.

* added error handling for all scenarios.

* moved extension menu items to the bottom of the more sub menu.

* added tests for configuring the title.

* minor refactorings.

* changed so you need to specify the full path in package.json.

* wip

* removed unused type.

* big refactor to make things simpler and to centralize all configure error/validation handling.

* added missing import.

* fixed failing tests.

* fixed tests.

* revert(extensions): remove static extensions config in favour of registering via AppPlugin APIs

* removed the compose that didn't work for some reason.

* added tests just to verify that validation and error handling is tied together in configuration function.

* adding some more values to the context.

* draft validation.

* added missing tests for getPanelMenu.

* added more tests.

* refactor(extensions): move logic for validating extension link config to function

* Fixed ts errors.

* Started to add structure for supporting commands.

* fixed tests.

* adding commands to the registry

* tests: group test cases in describe blocks

* tests: add a little bit more refactoring to the tests

* tests: add a test case for checking correct placements

* feat: first version of the command handler

* feat: register panel menu items with commands

* refactor: make the 'configure' function not optional on `PluginExtensionRegistryItem`

* Wip

* Wip

* Wip

* added test to verify the default configure function.

* added some more tests to verify that commands have the proper error handling for its configure function.

* tests: fix TS errors in tests

* tests: add auxiliary functions

* refactor: small refactoring in tests

* refactor: refactoring tests for registryFactory

* refactor: refactoring tests for registryFactory

* refactor: refactoring tests for registryFactory

* refactor: refactoring tests for registryFactory

* refactor: refactoring tests for registryFactory

* refactor: refactoring tests for registryFactory

* refactor: refactoring tests for registryFactory

* refactor: refactoring tests for registryFactory

* draft of wrapping command handler with error handling.

* refactor: refactoring tests for registryFactory

* added test for edge case.

* replaced the registry item with a configure function.

* renamed the configure function type.

* refactoring of the registryfactory.

* added tests for handler error handling.

* fixed issue with assert function.

* added comment about the limited type.

* Update public/app/features/plugins/extensions/errorHandling.test.ts

Co-authored-by: Levente Balogh <balogh.levente.hu@gmail.com>

* Update public/app/features/plugins/extensions/errorHandling.test.ts

Co-authored-by: Levente Balogh <balogh.levente.hu@gmail.com>

* Update public/app/features/plugins/extensions/errorHandling.test.ts

Co-authored-by: Levente Balogh <balogh.levente.hu@gmail.com>

* added missing tests.

---------

Co-authored-by: Jack Westbrook <jack.westbrook@gmail.com>
Co-authored-by: Levente Balogh <balogh.levente.hu@gmail.com>

.betterer.results

@@ -334,7 +334,8 @@ exports[`better eslint`] = {
     ],
     "packages/grafana-data/src/types/app.ts:5381": [
       [0, 0, 0, "Unexpected any. Specify a different type.", "0"],
-      [0, 0, 0, "Do not use any type assertions.", "1"]
+      [0, 0, 0, "Do not use any type assertions.", "1"],
+      [0, 0, 0, "Do not use any type assertions.", "2"]
     ],
     "packages/grafana-data/src/types/config.ts:5381": [
       [0, 0, 0, "Unexpected any. Specify a different type.", "0"]