Add annotation dataclasses to pkg_types.py

[NoB0]

Delete annotation.py and move its content to pkg_types.py.

Fixes #106

[github-actions]

Unit Test Results

58 tests   58 ✔️  6s ⏱️
  1 suites    0 💤
  1 files      0 ❌

Results for commit 11b75b4.

[github-actions]

Coverage Report •

File	Stmts	Miss	Cover	Missing
pkg_api
pkg.py	120	15	85%	73, 84, 106–116, 132, 201, 268–269, 277–>274, 310–313, 347–348
utils.py	76	2	95%	163–>175, 168, 226
pkg_api/core
pkg_types.py	43	1	96%	57
pkg_api/nl_to_pkg
eval_nl_to_pkg.py	63	10	81%	105, 134–>156, 135–>142, 142–>149, 149–>156, 161–187
nl_to_pkg.py	12	0	100%
pkg_api/nl_to_pkg/annotators
annotator.py	11	2	82%	19, 34
three_step_annotator.py	50	2	92%	94–>exit, 97, 123
pkg_api/nl_to_pkg/entity_linking
entity_linker.py	6	1	83%	24
rel_entity_linking.py	32	3	85%	36, 40–>38, 60, 92
spotlight_entity_linker.py	33	3	85%	36, 40–>38, 60, 92
tests/nl_to_pkg
test_eval_nl_to_pkg.py	34	0	100%
test_nl_to_pkg.py	48	0	100%
test_rel_entity_linker.py	42	0	100%
test_spotlight_entity_linker.py	43	0	100%
test_three_step_annotator.py	62	0	100%
tests/pkg_api
test_pkg.py	42	0	100%
test_utils.py	48	0	100%
TOTAL	1168	49	94%

[github-actions]

Current Branch	Main Branch

[kbalog]

LGTM

[WerLaj]

LGTM