chore: switch to ‹tar› and have consistent paths

* Switch the archiving from the ‹zip› to ‹tar.gz› and ‹tar.bz2›
* Adjust the static files to have consistent paths

Signed-off-by: Matej Focko <me@mfocko.xyz>

static/files/ib002/graphs/bfs-tree/bfs_graph.dot

@@ -0,0 +1,17 @@
+graph {
+    a -- c
+    a -- e
+
+    c -- i
+    c -- b
+
+    e -- j
+
+    i -- d
+
+    b -- h
+
+    d -- h
+
+    h -- j
+}

static/files/ib002/graphs/bfs-tree/bfs_graph_with_additional_edge.dot

@@ -0,0 +1,18 @@
+graph {
+    a -- c
+    a -- e
+
+    c -- i
+    c -- b
+
+    e -- j
+    e -- h
+
+    i -- d
+
+    b -- h
+
+    d -- h
+
+    h -- j
+}

static/files/ib002/graphs/bfs-tree/bfs_tree.dot

@@ -0,0 +1,13 @@
+digraph {
+    a -> c
+    a -> e
+
+    c -> b
+    c -> i
+
+    e -> j
+
+    b -> h
+
+    i -> d
+}

static/files/ib002/graphs/bfs-tree/bfs_tree_with_additional_edge.dot

@@ -0,0 +1,12 @@
+digraph {
+    a -> c
+    a -> e
+
+    c -> b
+    c -> i
+
+    e -> h
+    e -> j
+
+    i -> d
+}