chore: add linked list prototype

fullstack-cert/python-projects/linked-list/main.py

@@ -0,0 +1,37 @@
+class LinkedList:
+    class Node:
+        def __init__(self, element):
+            self.element = element
+            self.next = None
+
+    def __init__(self):
+        self.length = 0
+        self.head = None
+
+    def is_empty(self):
+        return self.length == 0
+
+    def add(self, element):
+        node = self.Node(element)
+        if self.is_empty():
+            self.head = node
+        else:
+            current_node = self.head
+            while current_node.next is not None:
+                current_node = current_node.next
+            current_node.next = node
+        self.length += 1
+
+    def remove(self, element):
+        previous_node = None
+        current_node = self.head
+        while current_node is not None and current_node.element != element:
+            previous_node = current_node
+            current_node = current_node.next
+        if current_node is None:
+            return
+        elif previous_node is not None:
+            previous_node.next = current_node.next
+        else:
+            self.head = current_node.next
+        self.length -= 1