doc: reference: pm: include all API and move to pm

Include all API groups (some where missing) and move to pm folder
instead of power_management for consistency.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>

doc/reference/api/overview.rst

@@ -242,7 +242,7 @@ current :ref:`stability level <api_lifecycle>`.
      - 1.0
      - 1.11
 
-   * - :ref:`power_management_api`
+   * - :ref:`pm_api`
      - Experimental
      - 1.2
      - 2.2

doc/reference/index.rst

@@ -28,7 +28,7 @@ API Reference
    networking/index.rst
    peripherals/index.rst
    pinctrl/index.rst
-   power_management/index.rst
+   pm/index.rst
    random/index.rst
    resource_management/index.rst
    shell/index.rst

doc/reference/pm/index.rst

@@ -0,0 +1,34 @@
+.. _pm_api:
+
+Power Management
+################
+
+System PM APIs
+**************
+
+.. doxygengroup:: subsys_pm_sys
+
+States
+======
+
+.. doxygengroup:: subsys_pm_states
+
+Constraints
+===========
+
+.. doxygengroup:: subsys_pm_sys_constraint
+
+Hooks
+=====
+
+.. doxygengroup:: subsys_pm_sys_hooks
+
+Device PM APIs
+**************
+
+.. doxygengroup:: subsys_pm_device
+
+Device Runtime PM APIs
+**********************
+
+.. doxygengroup:: subsys_pm_device_runtime

doc/reference/power_management/index.rst

@@ -1,24 +0,0 @@
-.. _power_management_api:
-
-Power Management
-################
-
-API Reference
-*************
-
-Power Management Hook Interface
-===============================
-
-.. doxygengroup:: subsys_pm_sys_hooks
-
-System Power Management APIs
-============================
-
-.. doxygengroup:: subsys_pm_sys
-
-Device Power Management APIs
-============================
-
-.. doxygengroup:: subsys_pm_device
-
-.. doxygengroup:: subsys_pm_device_runtime