Add defer operator

[velialiev]

Description

#329

(Why we should add this method?)

Checklist for a new method

• Create a directory for the new method in the src directory in param-case
• Place the source code to src/method-name/index.ts in ESModules export in camelCase named export
• Add tests to src/method-name/method-name.test.ts
• Add fork tests to src/method-name/method-name.fork.test.ts
• Add type tests to test-typings/method-name.ts
  • Use // @ts-expect-error to mark expected type error
  • import { expectType } from 'tsd' to check expected return type
• Add documentation in src/method-name/readme.md
  • Add header Patronum/MethodName
  • Add section with overloads, if have
  • Add Motivation, Formulae, Arguments and Return sections for each overload
  • Add useful examples in Example section for each overload
• Fill frontmatter in src/method-name/readme.md
  • Add title. Make sure it uses camelCase syntax just like the method itself
  • Add slug. Use param-case to write it. In most cases it will be just like title
  • Add desription with one short sentence describing what method useful for
  • Add group. To categorize method on /operators page. Full list of available groups, you can see in documentation/src/content/config.ts

[velialiev]

if condition is already true then call event immediately

[velialiev]

if condition is not true yet then defer event call until condition became true

[velialiev]

if condition became true and then false we should reset combine events since event call should be deferred until condition will be true again

[velialiev]

there could be 4 cases:

1. Event called, condition is true --> call event
2. Event called, condition is false --> wait until condition will be true and call event
3. Condition became true, event is not called yet --> wait until event is called
4. Condition became false, event is not called yet --> reset the state and wait both for event and condition to become true

IMPORTANT: if clock will be called more than 1 time only the last event will be deferred and called. Other events will be ignored

[YanLobat]

My suggestion is to write test(s)
And small motivation text(aka your case for example for explanation for other potential users)

P.S. yes I know that defer is a common practice but still applicable example will be very much appreciated

[sergeysova]

Added default pull request template to help making new operator