docs: fixes few things (#4249)

docs/config_builder.py

@@ -0,0 +1,35 @@
+
+import os
+
+base_path = os.path.dirname(__file__)
+dst_config = os.path.join(base_path, 'lv_conf.h')
+src_config = os.path.abspath(os.path.join(
+    base_path,
+    '..',
+    'lv_conf_template.h'
+))
+
+
+def run():
+    with open(src_config, 'r') as f:
+        data = f.read()
+
+    data = data.split('\n')
+
+    for i, line in enumerate(data):
+        if 'LV_USE' in line or 'LV_FONT' in line:
+            line = [item for item in line.split(' ') if item]
+            for j, item in enumerate(line):
+                if item == '0':
+                    line[j] = '1'
+            line = ' '.join(line)
+            data[i] = line
+    data = '\n'.join(data)
+
+    with open(dst_config, 'w') as f:
+        f.write(data)
+
+
+def cleanup():
+    if os.path.exists(dst_config):
+        os.remove(dst_config)