Add libnetdata readmes to learn, delete empty (#14371)

Co-authored-by: Christopher Akritidis <cakrit@DESKTOP-C7OKV71.localdomain>

libnetdata/arrayalloc/README.md

@@ -1,7 +0,0 @@
-<!--
-title: "Array Allocator"
-custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/arrayalloc/README.md
--->
-
-# Array Allocator
-

libnetdata/avl/README.md

@@ -1,6 +1,10 @@
 <!--
 title: "AVL"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/avl/README.md
+sidebar_label: "AVL"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers"
 -->
 
 # AVL

libnetdata/circular_buffer/README.md

@@ -1,6 +1,10 @@
 <!--
-title: "circular_buffer"
+title: "Circular Buffer"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/circular_buffer/README.md
+sidebar_label: "Circular Buffer"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers"
 -->
 
 # Circular Buffer

libnetdata/ebpf/README.md

@@ -1,5 +0,0 @@
-<!--
-custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/ebpf/README.md
--->
-
-

libnetdata/json/README.md

@@ -1,6 +1,10 @@
 <!--
 title: "json"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/json/README.md
+sidebar_label: "JSON"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers"
 -->
 
 # json

libnetdata/locks/README.md

@@ -1,5 +1,10 @@
 <!--
+title: "Locks"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/locks/README.md
+sidebar_label: "Locks"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers"
 -->
 
 ## How to trace netdata locks

libnetdata/log/README.md

@@ -1,5 +0,0 @@
-<!--
-custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/log/README.md
--->
-
-

libnetdata/onewayalloc/README.md

@@ -1,6 +1,10 @@
 <!--
 title: "One Way Allocator"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/onewayallocator/README.md
+sidebar_label: "One way allocator"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers"
 -->
 
 # One Way Allocator

libnetdata/popen/README.md

@@ -1,5 +0,0 @@
-<!--
-custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/popen/README.md
--->
-
-

libnetdata/procfile/README.md

@@ -1,6 +1,10 @@
 <!--
 title: "PROCFILE"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/procfile/README.md
+sidebar_label: "Procfile"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers"
 -->
 
 # PROCFILE