[PM-9869] Create SendFormContainer (#10147)

* Move SendV2component into send-v2 subFolder

* Create SendFormContainer and related services

* Add initial SendFormComponent which uses the SendFormContainer

* Remove AdditionalOptionsSectionComponent which will be added with a future PR

* Add libs/tools/send to root tsconfig

* Register libs/tools/send/send-ui with root jest.config.js

* Register libs/tools/send/send-ui with root tailwind.config.js

* Fix service injection on DefaultSendFormService

---------

Co-authored-by: Daniel James Smith <djsmith85@users.noreply.github.com>

libs/tools/send/send-ui/src/send-form/send-form-container.ts

@@ -0,0 +1,36 @@
+import { SendView } from "@bitwarden/common/tools/send/models/view/send.view";
+
+import { SendFormConfig } from "./abstractions/send-form-config.service";
+/**
+ * The complete form for a send. Includes all the sub-forms from their respective section components.
+ * TODO: Add additional form sections as they are implemented.
+ */
+export type SendForm = object;
+
+/**
+ * A container for the {@link SendForm} that allows for registration of child form groups and patching of the send
+ * to be updated/created. Child form components inject this container in order to register themselves with the parent form
+ * and access configuration options.
+ *
+ * This is an alternative to passing the form groups down through the component tree via @Inputs() and form updates via
+ * @Outputs(). It allows child forms to define their own structure and validation rules, while still being able to
+ * update the parent send.
+ */
+export abstract class SendFormContainer {
+  /**
+   * The configuration for the send form.
+   */
+  readonly config: SendFormConfig;
+
+  /**
+   * The original send that is being edited/cloned. Used to pre-populate the form and compare changes.
+   */
+  readonly originalSendView: SendView | null;
+
+  abstract registerChildForm<K extends keyof SendForm>(
+    name: K,
+    group: Exclude<SendForm[K], undefined>,
+  ): void;
+
+  abstract patchSend(send: Partial<SendView>): void;
+}