New Group and Access Policies Document and Initial Reorganization of Access Control Structure (#477)

* New Access Control and ReOrg

* Enhance Access Control Documentation and Add New Resources

- Updated `next.config.mjs` to include new redirects for access control documentation.
- Added multiple images related to access control and endpoint detection and response.
- Refactored links in various documentation files to point to the new access control structure.
- Removed outdated documentation files and created new ones for managing access control and endpoint detection.
- Introduced a new section for understanding posture checks and their implementation in access control.

This commit aims to improve the organization and clarity of access control resources, aligning with the recent restructuring of documentation.

* Remove outdated Intune MDM documentation and update links in access control resources. This commit enhances the organization of the documentation by eliminating obsolete files and ensuring all references to Microsoft Intune are correctly aligned with the new structure.

* Fix typos in access control documentation for clarity and accuracy. Updated "Understnading" to "Understanding" and corrected "NerBird" to "NetBird" in relevant sections.
* Fix typo in Access Control section
* Fix formatting in posture checks documentation
* Added a space in the Posture Checks reference for clarity.

src/pages/how-to/getting-started.mdx

@@ -100,11 +100,11 @@ The final onboarding step introduces NetBird's powerful Access Control policies.
 ![NetBird policy disabled](/docs-static/img/getting-started/08_policy-disabled-example.jpeg)
 1. By default, a policy is active that allows connections between all your devices. This is why the ping command in the previous step worked.
 2. The wizard demonstrates this by allowing you to toggle the policy. If you disable the "Default Policy," the ping between your devices will immediately fail with a "Request timeout" error.
-3. Re-enabling the policy instantly restores the connection. This gives you a basic understanding of how you can control traffic within your network. You can learn much more about policies [here](/how-to/manage-network-access).
+3. Re-enabling the policy instantly restores the connection. This gives you a basic understanding of how you can control traffic within your network. You can learn much more about policies [here](/manage/access-control/manage-network-access).
 4. Click Continue to finish.
 
 ![Policy Example](/docs-static/img/getting-started/09_policy-example.jpeg)
-In the policy example above, we allowed _IT Admins_ port specific access to peers under the _AWS Servers_ group. Policies are a key building block to access in NetBird. You can learn more about the power of policies [here](https://docs.netbird.io/how-to/manage-network-access).
+In the policy example above, we allowed _IT Admins_ port specific access to peers under the _AWS Servers_ group. Policies are a key building block to access in NetBird. You can learn more about the power of policies [here](https://docs.netbird.io/manage/access-control/manage-network-access).
 
 <Note>
     If you manage users and groups with your identity provider, you can provision and sync them with NetBird. Learn more [here](https://docs.netbird.io/how-to/idp-sync) including the supported platforms.
@@ -183,7 +183,7 @@ Click Go to Dashboard to access the main NetBird admin panel. From here, you can
 * [Control Center](https://docs.netbird.io/how-to/control-center): Visualize your network topology and access relationships with an interactive graph.
 * [Peers](https://docs.netbird.io/how-to/add-machines-to-your-network): View and manage all connected devices and their properties.
 * [Setup Keys](https://docs.netbird.io/how-to/register-machines-using-setup-keys): Create and manage keys for adding new headless or ephemeral devices.
-* [Access Control](https://docs.netbird.io/how-to/manage-network-access): Define granular firewall rules to control which peers can access what.
+* [Access Control](https://docs.netbird.io/manage/access-control/manage-network-access): Define granular firewall rules to control which peers can access what.
 * [Team](https://docs.netbird.io/how-to/add-users-to-your-network): Manage users and create groups for easier policy management.
 
 You are now ready to explore the full capabilities of NetBird.