Yotam playg 37 support insert

[yotam-yakovw]

added 2 funcs for get and append requests to the spreadsheet api that are used by relevant methods for reading/writing data to the spreadsheet, also added func for getting the spreadsheet values resource to avoid repeating code.

[yotam-yakovw]

Fixes:

• Training API calls and data handling separated to different files.
• New files and functions got new clearer names (including one typo), changes needed to be updated in 'main_flow.py' and 'init.py' files to use the correct function names.
• Added a testing module for getting and inserting data to the spreadsheet, testing was based on testing files already in the project, testing variables moved to the new test file.

Notes:

• Parameter handling for inserting data to spreadsheet was changed because it (seems) unnecessarily complicated and made a mess for the request. If the structure of the sent parameter should be changed I would like to get an explanation about how the data is sent to the insert_values function.
• About the testing module I'm not fully sure it is how it should be, it's made from what I managed to find online and existing test files I could find in the project, I'm sending it now as it is and expecting feedback.
• Copied the token.pickle file from data_loader folder to the new test folder, just pointing that out to avoid mistakes.

[smartFreshBear]

1- let's talk a little about your commits - you almost doing it good. each commit suppose to pack an agenda of what you intended to do, which you did BUT take in account, that changes on changes you did, should be avoided as much as possible. for example: commit 1 = 'adding feature to made car faster' commit 2 = 'testing car is fast' commit 3 = 'fixing some stuff I discovered later after testing car'

will just pollute the master branch. to avoid it before updating PR we usually squash commit together (in my example 1 and 3)

2- u have a conflict fix it when u have time :)

(other comments are on they way)

[yotam-yakovw]

fixed everything I could, would like to hear your feedback about the rewrite of the training functions and if there is a way to improve (probably...) also waiting for answer on last conversation