website/integrations: komga: document (#12476)

* website/integrations/komga: add integration to sidebar

Adds the Komga integration to the sidebar

Signed-off-by: 4d62 <github-user@sdko.org>

* website/integrations: komga: main body

Rewrite previous documentation. Update YML to new format as per the example in the [advanced configuration documentation](https://komga.org/docs/installation/oauth2/#advanced-configuration). Just a few changes

Signed-off-by: 4d62 <github-user@sdko.org>

* website/integrations: komga: add user-name-attribute warning & change default

Updates the default `user-name-attribute` from `sub` to `preferred_username` (I would assume that's what users prefer if there's collaboration, idk) & adds a warning similar to what I did in that latest Mastodon MR.

Signed-off-by: 4d62 <github-user@sdko.org>

* website/integrations: komga: fix

Fixes markdown for service link and updates `authentik.company` placeholder.

Signed-off-by: 4d62 <github-user@sdko.org>

* website/integrations: komga: cleanup phrasing

Restructures the "authentik configuration" section and updates the first sentence of the "Komga configuration" section

Signed-off-by: 4d62 <github-user@sdko.org>

* website/integrations: komga: lint

Lints modified file with Prettier.

Signed-off-by: 4d62 <github-user@sdko.org>

* website/integrations: komga: fix bold elements

Accidentally removed bold from step 1 of "authentik configuration". This fixes the issue.

Signed-off-by: 4d62 <github-user@sdko.org>

* website/integrations: komga: remove hyphen from yml

Others don't have it so this one should not

Signed-off-by: 4d62 <github-user@sdko.org>

* website/integrations: komga: Address review comments

Addresses comments & applies suggestions from the first review round.

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Signed-off-by: 4d62 <github-user@sdko.org>

website/sidebarsIntegrations.js

@@ -127,6 +127,7 @@ module.exports = {
                         "services/home-assistant/index",
                         "services/immich/index",
                         "services/jellyfin/index",
+                        "services/komga/index",
                         "services/node-red/index",
                         "services/sonar-qube/index",
                         "services/sonarr/index",