chore: reorganize docs apps (#7228)

* reorganize docs apps

* add README

* fix directory

* add condition for old docs

www/apps/api-reference/specs-v2/store/components/examples/database_error.yaml

@@ -0,0 +1,5 @@
+summary: Database Error
+value:
+  code: api_error
+  message: An error occured while hashing password
+  type: database_error

www/apps/api-reference/specs-v2/store/components/examples/default_error.yaml

@@ -0,0 +1,5 @@
+summary: Default Error
+value:
+  code: unknown_error
+  message: An unknown error occurred.
+  type: unknown_error

www/apps/api-reference/specs-v2/store/components/examples/invalid_argument_error.yaml

@@ -0,0 +1,4 @@
+summary: Invalid Argument Error
+value:
+  message: cart.total must be defined
+  type: unexpected_state

www/apps/api-reference/specs-v2/store/components/examples/invalid_data_error.yaml

@@ -0,0 +1,4 @@
+summary: Invalid Data Error
+value:
+  message: first_name must be a string
+  type: invalid_data

www/apps/api-reference/specs-v2/store/components/examples/multiple_errors.yaml

@@ -0,0 +1,10 @@
+summary: Multiple Errors
+value:
+  message: >-
+    Provided request body contains errors. Please check the data and retry the
+    request
+  errors:
+    - message: first_name must be a string
+      type: invalid_data
+    - message: Discount must be set to dynamic
+      type: not_allowed

www/apps/api-reference/specs-v2/store/components/examples/not_allowed_error.yaml

@@ -0,0 +1,4 @@
+summary: Not Allowed Error
+value:
+  message: Discount must be set to dynamic
+  type: not_allowed

www/apps/api-reference/specs-v2/store/components/examples/unexpected_state_error.yaml

@@ -0,0 +1,4 @@
+summary: Unexpected State Error
+value:
+  message: cart.total must be defined
+  type: unexpected_state