feat(schedules): add schedules feature, refactor promise api

[guergabo]

CHANGES:

• schedules cli commands
• promise cli commands
• schedules crud api
• promises rest api refactor
• schedule cron job coroutine
• sqlite implementation
• initial templated promise id with {{.timestamp}}
• updated promise protos and openapi
• dst for schedules crud
• service unit testing
• ignore codecov.yml

FOLLOW-UP PRs:

• --data (base64) cannot disable or enable, --blob take whatever (fail differently).
• util.write() + tests separate issue
• update test harness
• update docs with feature + new error messages
• grpc support / update protos
• requires updating sdks to use new promise API
• dst schedulePromises coroutine
• postgres (aio unit tests blocked by this, but coverage is covered by dst already)

DEPENDS ON:

• refactor to rest durable-promise-specification#13

[codecov]

Codecov Report

Attention: 476 lines in your changes are missing coverage. Please review.

Comparison is base (23df570) 68.86% compared to head (e5a01be) 66.60%.

Files	Patch %	Lines
internal/app/coroutines/schedulePromises.go	25.92%	78 Missing and 2 partials ⚠️
internal/app/subsystems/aio/store/sqlite/sqlite.go	56.77%	56 Missing and 11 partials ⚠️
cmd/promise/complete_promise.go	0.00%	52 Missing ⚠️
internal/app/subsystems/api/service/schedule.go	60.52%	32 Missing and 13 partials ⚠️
cmd/promise/list_promises.go	0.00%	44 Missing ⚠️
internal/app/subsystems/api/http/schedule.go	0.00%	40 Missing ⚠️
cmd/promise/describe_promise.go	0.00%	30 Missing ⚠️
internal/app/coroutines/createSchedule.go	80.67%	18 Missing and 5 partials ⚠️
test/dst/model.go	63.15%	20 Missing and 1 partial ⚠️
cmd/promise/create_promise.go	79.31%	10 Missing and 2 partials ⚠️
... and 13 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #147      +/-   ##
==========================================
- Coverage   68.86%   66.60%   -2.27%     
==========================================
  Files          62       76      +14     
  Lines        6180     7214    +1034     
==========================================
+ Hits         4256     4805     +549     
- Misses       1645     2100     +455     
- Partials      279      309      +30     

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