Added a UI to create timelogs

What does this MR do and why?

Related to &8429.

This MR adds the UI to allow users to create a time entry without using the quick action 🙂

The button to open the form is only visible for Reporter+ users since guests cannot create time entries.

The form also supports quick submit to quickly create a time entry with:

• Ctrl + Enter or Cmd + Enter when the focus is on the Summary text area field
• Simply Enter when focus is on the Time spent field.

Screenshots or screen recordings

Create a time entry

Registrazione_schermo_2022-11-25_alle_22.25.38

Create a time entry for a specific date

Registrazione_schermo_2022-11-25_alle_22.27.55

Display of error

Ipsa_rerum_nostrum_et_neque_eaque_sed_laboriosam_ipsum_omnis_sint.__10____Issues___Flightjs___Flight___GitLab-Personale-_Microsoft__Edge_2022-11-29_09-47-35

How to set up and validate locally

1. Go to an issuable page, either Issue or Merge Request
2. Use the + button on the Time tracking section of the sidebar to create a time entry

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.