feat(plugins): Task #77: plugins changes

[str-anger]

[x] Support default values in variable definition [x] Support bool type (checkbox) [x] multiline -> textarea [x] Dropdown strings (select -> option?) [x] Save log into an experiment; return a file name [x] Expose a single experiment for a function [x] Have both description and display_name

[github-actions[bot]]

Coverage Report

File	Stmts	Miss	Cover	Missing
aqueductcore/backend
context.py	33	4	88%	48–52, 59–60
main.py	19	4	79%	21–24, 31
session.py	13	4	69%	24–28
aqueductcore/backend/models
orm.py	31	1	97%	58
plugin.py	141	13	91%	53, 56, 80–81, 88, 94, 96–97, 170, 211, 215, 239, 245
aqueductcore/backend/routers
files.py	85	2	98%	157–158
frontend.py	24	11	54%	22–33, 37
aqueductcore/backend/routers/graphql
mutations_schema.py	52	2	96%	42, 116
query_schema.py	45	2	96%	66–68
router.py	11	1	91%	15
aqueductcore/backend/routers/graphql/mutations
experiment_mutations.py	21	1	95%	29
aqueductcore/backend/routers/graphql/resolvers
experiment_resolver.py	25	2	92%	28, 36
tags_resolver.py	25	3	88%	14, 44, 46
aqueductcore/backend/services
experiment.py	217	32	85%	82, 111–124, 154, 188, 194, 240, 243, 268, 299, 349, 355, 384, 390, 398, 428, 435, 443, 473–479, 486–490, 502–505
plugin_executor.py	43	7	84%	38–39, 55, 71–73, 100
validators.py	33	2	94%	41, 46
TOTAL	1042	91	91%

Tests	Skipped	Failures	Errors	Time
85	1 :zzz:	0 :x:	0 :fire:	12.112s :stopwatch: