Add function parameter rename functionality

[TSNoble]

i.e. give function parameters one-letter names to save space. Default to not using this option to maintain clarity of code?

[TSNoble]

Idea:

• Parse file and find scopes
• Iterate over each scope
• Iterate over names defined in scope
• Replace all occurrences with unique short symbol

[TSNoble]

class Code:

   def __init__(bytes)
      self.bytes = bytes
      self.scopes = []
      build_scopes()

   def build_scopes(bytes):
      ...
   
   def substitute(old_name, new_name, range):
      re.sub(old_name, new_name, code.bytes[range[0]:range[1]])

class Scope:

   def __init__(name, range, code):
      self.name = name
      self.range = range
      self.defined_variables = []
      self.code.scopes.append(self)

   def rename_variable(old_name, new_name):
      self.code.substitute(old_name, new_name, self.range)
      self.defined_variables.remove(old_name)
      self.defined_variabled.append(new_name)

   def rename_all_variables(name_generator):
      for variable in self.defined_variables:
         self.rename(variable, name_generator())

def shorten_variable_names(bytes):
   code = Code(bytes)
   for scope in code.scopes:
      scope.rename_all_variables(unique_short_name)