Update docs for mautrix bridges (follow-up) (#3924)

* Update docs/configuring-playbook-bridge-mautrix-telegram.md

- Add a link to the official documentation on authentication
- Create subsections in the section "Usage"
- Update the usage based on d33701428d/bridges/python/telegram/authentication.md

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

* Update docs/configuring-playbook-bridge-mautrix-twitter.md

- Remove a duplicated "optional" label
- Replace the instruction with a link to the official documentation on authentication

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

* Update docs/configuring-playbook-bridge-appservice-kakaotalk.md

- Adopt a common introduction
- Move the warning message down

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

* Update docs/configuring-playbook-bridge-mautrix-discord.md

As our instruction on usage has been outdated compared to the latest one (cf. d33701428d/bridges/go/discord/authentication.md), let alone confusing in the first place as our instruction on logging in and bridging have been mixed, this commit updates our instruction based on the latest official one.

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

* Update docs/configuring-playbook-bridge-mautrix-gmessages.md: add a link to the official documentation on authentication

Based on d33701428d/bridges/go/gmessages/authentication.md

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

* Update docs for mautrix-meta bridges: add links to the official documentation on authentication

Based on d33701428d/bridges/go/meta/authentication.md

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

* Update docs/configuring-playbook-bridge-mautrix-signal.md: add a link to the official documentation on authentication

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

* Update docs/configuring-playbook-bridge-mautrix-slack.md

Based on d33701428d/bridges/go/slack/authentication.md

The instruction has been obsolete since 25b4006035

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

* Update docs/configuring-playbook-bridge-mautrix-googlechat.md

Based on d33701428d/bridges/python/googlechat/authentication.md

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

* Update docs/configuring-playbook-bridge-mautrix-bridges.md: add information about troubleshooting

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

* Update docs for mautrix bridges: add descriptions for each mautrix bridge about the bridges behavior after logging in

Based on d33701428d

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

* Update docs for mautrix bridges: add instruction for sending "help" to the bot to the common guide

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

* Update docs/configuring-playbook-bridge-mautrix-hangouts.md: adopt a common description about usage

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

* Update docs/configuring-playbook-bridge-mautrix-whatsapp.md

- Update the note about linked devices that they will be logged out if the phone is not used over two weeks: the note has been obsolete since 0860109d05
- Adopt a common description about usage

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

* Update docs for mautrix bridges: fix the internal anchor link

Regression by 4b2e066a61

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

* Update docs/configuring-playbook-bridge-mautrix-bridges.md: add a note about the official docs

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

* Update docs/configuring-playbook-bridge-go-skype-bridge.md: adopt the common description

As the bridge was created based on mautrix-whatsapp, this commit adopts the common descriptions for mautrix bridges and ones based on them such as matrix-appservice-kakaotalk and beeper-linkedin

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/configuring-playbook-bridge-mautrix-facebook.md

@@ -30,7 +30,7 @@ matrix_mautrix_facebook_enabled: true
 
 There are some additional things you may wish to configure about the bridge.
 
-See [this section](configuring-playbook-bridge-mautrix-bridges.md#extending-the-configuration) on the [common guide for configuring mautrix bridges](configuring-playbook-bridge-mautrix-bridges.md) for details about variables that you can customize and the bridge's default configuration, including [bridge permissions](configuring-playbook-bridge-mautrix-bridges.md#configure-bridge-permissions-optional), [encryption support](configuring-playbook-bridge-mautrix-bridges.md#enable-encryption-optional), [relay mode](configuring-playbook-bridge-mautrix-bridges.md#enable-relay-mode-optional), [bot's username](configuring-playbook-bridge-mautrix-bridges.md#setting-the-bot-s-username-optional), etc.
+See [this section](configuring-playbook-bridge-mautrix-bridges.md#extending-the-configuration) on the [common guide for configuring mautrix bridges](configuring-playbook-bridge-mautrix-bridges.md) for details about variables that you can customize and the bridge's default configuration, including [bridge permissions](configuring-playbook-bridge-mautrix-bridges.md#configure-bridge-permissions-optional), [encryption support](configuring-playbook-bridge-mautrix-bridges.md#enable-encryption-optional), [relay mode](configuring-playbook-bridge-mautrix-bridges.md#enable-relay-mode-optional), [bot's username](configuring-playbook-bridge-mautrix-bridges.md#set-the-bots-username-optional), etc.
 
 ## Installing