feat: by default, education and professional experience entries are ranked in reverse chronological order

[henrylin03]

• this is a subtask of #8 for the education section

• 15 will enhance this feature to give users more control

conditions

• [ ] if all entries have an end date, then the one that ended (graduated) most recently is displayed
• [ ] entries without end date should be pushed to the top (as we assume they are still going with it)
• [ ] between entries without end dates, the start dates should determine rank, in reverse chronological order (the one that was started later is further up)

[henrylin03]

this is proving difficult to capture all the situations where user enters end date but not start date, vice versa, both, or neither... I'm almost tempted to just enable sorting by end dates when they are provided, and if they are not provided, they are just added to the top of the list, and the user can just reorder it themselves (issue #15)

[henrylin03]

moved into waiting to plan next steps

[henrylin03]

consider making dates compulsory to avoid having to deal with entries without it, and how to display without them - #43

[henrylin03]

consider making dates compulsory to avoid having to deal with entries without it, and how to display without them

i have begun doing this, however, there are some challenges with styling the month inputs on change of the value