Add "Web" to Element and SchildiChat web application (#3755)

* Replace "Element" with "Element Web"

- If Element indicates the web application, then it is changed to Element Web.
- If it indicates clients branded with Element such as Element desktop, web, mobile clients, then it is changed to Element clients.
- If it is combined with location sharing functionality, it is not changed.

with other some changes, including:

- Change "app.element.io" anchor link to "https://github.com/element-hq/element-web" on README.md, following other documentation files

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Replace "SchildiChat" with "SchildiChat Web"

- If SchildiChat indicates the web application, then it is changed to SchildiChat Web.
- If it indicates clients branded with SchildiChat such as SchildiChat desktop, web, mobile clients, then it is changed to SchildiChat clients.
- If it is combined with location sharing functionality, it is not changed.

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Rename configuring-playbook-client-schildichat.md to configuring-playbook-client-schildichat-web.md

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Rename configuring-playbook-client-element.md to configuring-playbook-client-element-web.md

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

---------

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>
Co-authored-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

roles/custom/matrix-client-schildichat/tasks/validate_config.yml

@@ -1,6 +1,6 @@
 ---
 
-- name: (Deprecation) Catch and report renamed Schildichat settings
+- name: (Deprecation) Catch and report renamed SchildiChat Web settings
   ansible.builtin.fail:
     msg: >-
       Your configuration contains a variable, which now has a different name.
@@ -9,10 +9,10 @@
   with_items:
     - {'old': 'matrix_client_schildichat_welcome_user_id', 'new': '<removed>'}
 
-- name: Fail if required SchildiChat settings not defined
+- name: Fail if required SchildiChat Web settings not defined
   ansible.builtin.fail:
     msg: >
-      You need to define a required configuration setting (`{{ item }}`) for using SchildiChat.
+      You need to define a required configuration setting (`{{ item }}`) for using SchildiChat Web.
   when: "vars[item] == ''"
   with_items:
     - matrix_client_schildichat_default_hs_url