feat: add yield table for tree type Birke Schwappach

[maximgrs]

Checklist

• The docs are up-to-date
• The roadmap is up to date

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
src/openyieldtables
__init__.py	0	0	100%
yieldtables.py	73	0	100%
src/openyieldtables/classes
__init__.py	0	0	100%
data_management.py	42	5	88%	40, 47, 76, 89, 95
src/openyieldtables/models
__init__.py	1	0	100%
yieldtable.py	37	0	100%
src/openyieldtables/utils
__init__.py	1	0	100%
utils.py	15	0	100%
TOTAL	169	5	97%