Restructure source code and imports

[Guzz-T]

No effective code change!

Only classes and functions were moved and the corresponding imports were changed.
Everything related to the socket interface has been moved to the subfolder cfi (config interface).

Changes:

• LuxtronikData and LuxtronikSocketInterface from luxtronik/__init__.py to luxtronik/cfi/interface.py
• Socket constants from luxtronik/constants.py to luxtronik/cfi/constants.py
• parse_version and version_in_range from luxtronik/shi/common.py to luxtronik/common.py
• LuxtronikDefinition, LuxtronikDefinitionsDictionary and LuxtronikDefinitionsList from luxtronik/shi/definitions.py to luxtronik/definitions/__init__.py
• The unit test files were also modified.

Follow-up of #222, relates to #221

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
luxtronik
__main__.py	25	25	0%	3–62
datatypes.py	399	2	99%	57, 127
discover.py	58	1	98%	62
luxtronik/cfi
interface.py	150	13	91%	82–95, 244–245, 250
parameters.py	29	1	97%	46
luxtronik/scripts
__init__.py	16	16	0%	3–28
discover_shi.py	60	60	0%	8–98
dump_changes.py	43	43	0%	7–85
dump_luxtronik.py	26	26	0%	6–52
dump_shi.py	19	19	0%	7–40
performance_shi.py	63	63	0%	7–89
watch_shi.py	38	38	0%	7–85
luxtronik/shi
contiguous.py	135	2	99%	261–262
TOTAL	2232	309	86%

Tests	Skipped	Failures	Errors	Time
363	0 💤	0 ❌	0 🔥	14.399s ⏱️