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>

docs/container-images.md

@@ -19,10 +19,10 @@ Web clients for Matrix that you can host on your own domains.
 
 | Service | Container image | Default? | Description |
 | ------- | --------------- | -------- | ----------- |
-| [Element](configuring-playbook-client-element.md) | [vectorim/element-web](https://hub.docker.com/r/vectorim/element-web/) | ✓ | Web UI, which is configured to connect to your own Synapse server by default |
+| [Element Web](configuring-playbook-client-element-web.md) | [vectorim/element-web](https://hub.docker.com/r/vectorim/element-web/) | ✓ | Default Matrix web client, configured to connect to your own Synapse server |
 | [Hydrogen](configuring-playbook-client-hydrogen.md) | [element-hq/hydrogen-web](https://ghcr.io/element-hq/hydrogen-web) | x | Lightweight Matrix client with legacy and mobile browser support |
 | [Cinny](configuring-playbook-client-cinny.md) | [ajbura/cinny](https://hub.docker.com/r/ajbura/cinny) | x | Simple, elegant and secure web client |
-| [SchildiChat](configuring-playbook-client-schildichat.md) | [etke.cc/schildichat-web](https://ghcr.io/etkecc/schildichat-web) | x | Based on Element, with a more traditional instant messaging experience |
+| [SchildiChat Web](configuring-playbook-client-schildichat-web.md) | [etke.cc/schildichat-web](https://ghcr.io/etkecc/schildichat-web) | x | Based on Element Web, with a more traditional instant messaging experience |
 
 ## Server Components