Add script to build the core

Python script used to build sketch(es) thanks to Arduino Builder
Python requirement >= 3.2 (due to concurrent.futures usage)

usage: arduino-builder.py [-h] [-l [{board,sketch}] | -a] [-b pattern] [-c]
                          [--arch architecture]
                          [--config <core configuration file>] [-v]
                          [--bin | --travis]
                          [-i <shetch filepath> | -f <sketches list filepath> | -s pattern | -e <excluded sketches list filepath>]

Signed-off-by: Angela Randolph <[email protected]>

Author: angela-rph

CI/build/.flake8

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CI/build/README.md

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+# arduino-builder.py
+
+This script manages _[arduino-builder](https://github.com/arduino/arduino-builder)_ command line tool for compiling Arduino sketch(es).
+
+## Requirements
+- [Arduino IDE](https://www.arduino.cc/en/Main/Software) (_[arduino-builder](https://github.com/arduino/arduino-builder)_ is included) 
+- Python version greater than or equal to  3.2 (due to `concurrent.futures` usage)
+
+## Usage
+
+```
+usage: arduino-builder.py [-h] [-l [{board,sketch}] | -a] [-b pattern] [-c]
+                          [--arch architecture]
+                          [--config <core configuration file>] [-v]
+                          [--bin | --travis]
+                          [-i <shetch filepath> | -f <sketches list filepath> | -s pattern | -e <excluded sketches list filepath>]
+
+Manage arduino-builder command line tool for compiling Arduino sketch(es).
+
+optional arguments:
+  -h, --help            show this help message and exit
+  -l [{board,sketch}], --list [{board,sketch}]
+                        list available board(s) or sketch(es)
+  -a, --all             build all sketches found for all available boards
+  -b pattern, --board pattern
+                        pattern to find one or more board(s) to build
+  -c, --clean           clean output directory
+                        <user patch config>/arduinoBuilderOutput
+  --arch architecture   core architecture to build. Default build architecture
+                        is stm32
+  --config <core configuration file>
+                        JSON file containing the build configuration for one
+                        or more maintainer/architecture. Board options for
+                        build, applicability of sketches for boards or
+                        required options. If sketch is not listed then
+                        applicable to all board. Default core configuration is
+                        for 'stm32' architecture in: <user patch config>/arduino-
+                        builder/conf/cores_config.json
+  -v, --verbose         enable arduino-builder verbose mode
+  --bin                 save binaries
+  --travis              Custom configuration for Travis CI build
+
+Sketch(es) options:
+  By default build <user patch config>/arduino/examples/01.Basics/Blink/Blink.ino
+
+  -i <shetch filepath>, --ino <shetch filepath>
+                        single ino file to build
+  -f <sketches list filepath>, --file <sketches list filepath>
+                        file containing list of sketches to build
+  -s pattern, --sketches pattern
+                        pattern to find one or more sketch to build
+  -e <excluded sketches list filepath>, --exclude <excluded sketches list filepath>
+                        file containing pattern of sketches to ignore. Default
+                        path : <user patch config>/arduino-builder/conf/exclude_list.txt
+```
+
+## Cores configuration files
+
+ToDo
+
+## Usage examples
+
+ToDo
+