perf: improving performance, layout (#215)

Co-authored-by: nullishamy <git@amyerskine.me>

sources/build/utils.py

@@ -0,0 +1,23 @@
+import re
+import shutil
+from dataclasses import dataclass
+
+
+@dataclass
+class Subsitution:
+    find: str
+    replace: str
+
+
+def find_and_replace(path: str, *subs: Subsitution):
+    with open(path, "r+") as f:
+        content = f.read()
+        f.seek(0)
+        f.truncate()
+        for sub in subs:
+            content = re.sub(sub.find, sub.replace, content)
+        f.write(content)
+
+
+def init_tweaks_temp(src_dir):
+    shutil.copyfile(f"{src_dir}/sass/_tweaks.scss", f"{src_dir}/sass/_tweaks-temp.scss")