chore(documentation): documentation and manuals for ZITADEL (#710)

* chore: cleanup old docs folder

* remove docs path trigger

* wip docs structure

* chore: ignore site changes in ci

* add manuals route

* new structure

* structure

* Use correct title

* remove trigger for code scan for static site generator

* change names

* add lorem ipsum to test styling

* use h3 to deeplink

* add site to dependabot

* lint readme.md

* remove not needed file

* ignore site on pull request code scan

* add initial contrib

* Minor correction

* Added section Developer & Integration

* Changed link list layout, added labels, added translations

* Added missing <li> tags

* Added correct link to section Developer & Integration

* Fixing list style

* Overhauling description texts and translations

* outline

* teaser go

* outline

* wip

* rework

* wip

* wip

* wip

* hop

* wip

* first draft for "administrate" done

* init outline

* fix deploy step

* lint

* commit wip

* commit wip

* md lint

* Link

* fix: path to edit (#711)

* wip

* wip

* wip

* what are...

* use only features

* wip docs

* Update 00-user.en.md

* project

* uppercase en

* wip

* wip

* wip

* policies rework

* improve text

* correct typo

* update readme

* correct styling

* add link to docs guides

* make the linter happy

* rename

* wip

* move api to own file

* correct links and lint

* wip roles and integration

* add pkce

* reduce padding and margin

* wip scope and claims

* wip claim & scopes

* make the linter happy

* insert links where possible

* wip

* wip roles & providers

* Update README.md

* Update 00-user.en.md

* minor text improvements

* use master branch to deploy

* use proper ci file

* Apply suggestions from code review

Co-authored-by: Fabi <38692350+fgerschwiler@users.noreply.github.com>

Co-authored-by: Matthias M. Schneider <mati@matimax.info>
Co-authored-by: Max Peintner <max@caos.ch>
Co-authored-by: Fabi <38692350+fgerschwiler@users.noreply.github.com>

site/docs/administrate/00-overview.en.md

@@ -0,0 +1,40 @@
+---
+title: Overview
+---
+
+> All documentations are under active work and subject to change soon!
+
+### Features
+
+- Single-Sign On (SSO) and Single-Log Out (SLO) for
+  - Web applications
+    - Server Renderer
+    - Single Page
+  - Native Clients
+    - Windows
+    - MacOS
+    - Linux
+  - Mobile Clients
+    - Android
+    - iOS / iPadOS
+- Bearer Tokens to use with APIs
+  - REST
+  - GRPC
+  - GraphQL
+- Role Based Access Control
+- OpenID Connect 1.0 (OIDC) support
+- OAuth 2.0 support
+- Identity Brokering
+  - Federation with OIDC and OAuth 2.0 Identity Providers
+  - Social Login
+- Management Console for central management of your data
+- Multi-factor Authentication
+  - Support for TOTP/HOTP with any app, like authy, google authenticator, ...
+- User self-registration, recover password, email and phone verification, etc.
+- Organisation self-registration, domain verification, policy management
+- API's for easy integration in your application
+
+### Concepts
+
+With ZITADEL there are some key concepts some should be aware of before using it to secure your applications and services.
+You find these definitions in the "What is..." heading of each resource.