massive refactoring to switch from camelCase to snake_case:

historically, Libervia (SàT before) was using camelCase as allowed by PEP8 when using a
pre-PEP8 code, to use the same coding style as in Twisted.

However, snake_case is more readable and it's better to follow PEP8 best practices, so it
has been decided to move on full snake_case. Because Libervia has a huge codebase, this
ended with a ugly mix of camelCase and snake_case.

To fix that, this patch does a big refactoring by renaming every function and method
(including bridge) that are not coming from Twisted or Wokkel, to use fully snake_case.

This is a massive change, and may result in some bugs.

sat/tools/common/utils.py

@@ -111,7 +111,7 @@ class OrderedSet(collections.abc.MutableSet):
         self._dict.update({i: None for i in items})
 
 
-def parseSize(size):
+def parse_size(size):
     """Parse a file size with optional multiple symbole"""
     try:
         return int(size)
@@ -143,7 +143,7 @@ def parseSize(size):
             raise ValueError(f"invalid size: {e}")
 
 
-def getSizeMultiplier(size, suffix="o"):
+def get_size_multiplier(size, suffix="o"):
     """Get multiplier of a file size"""
     size = int(size)
     #  cf. https://stackoverflow.com/a/1094933 (thanks)
@@ -154,6 +154,6 @@ def getSizeMultiplier(size, suffix="o"):
     return size, f"Yi{suffix}"
 
 
-def getHumanSize(size, suffix="o", sep=" "):
-    size, symbol = getSizeMultiplier(size, suffix)
+def get_human_size(size, suffix="o", sep=" "):
+    size, symbol = get_size_multiplier(size, suffix)
     return f"{size:.2f}{sep}{symbol}"