Update Published Schedule and Day backend routes

[h0ethan04]

Information:

Add GET, POST, PUT, DELETE basic routes for Day table
Update Published Schedule routes:

• Add "Day" information to returned data of /season and /date as JSON object at same level as date and events.
• Update POST request to require day id (second passed parameter), and accept as the cohort parameter one or more of the following strings {"junior", "senior", "both"} and convert the string into the appropriate cohort year.
• Update PUT request to take day id

Acceptance Criteria:

• Day routes work and return information about the day
• Published Schedule post request should accept one or more of {"junior", "senior", "both"} as a valid query parameter
• Published Schedule /season route should return an array of json with the following format

[
  {
          "date": "2024-02-26T08:00:00.000Z",
          "day": {
              // information from related day
          }
          "events": [
              {
                  "id": 14,
                  "title": "title2",
                  "eventType": "workshop",
                  "year": "junior",
                  "startTime": "2024-02-26T01:05:34.128724",
                  "endTime": "2024-02-26T01:05:34.128724",
                  "confirmed": false,
                  "confirmedOn": "2024-02-26",
                  "cohort": [
                      "2024"
                  ],
                  "notes": null
              }
          ]
      }
]

• Published Schedule /date route should return a JSON object with the following format:

{
  day: { 
    // day information 
  }
  events: [
      {
          "id": 14,
          "title": "title2",
          "eventType": "workshop",
          "year": "junior",
          "startTime": "2024-02-26T09:05:34.128Z",
          "endTime": "2024-02-26T09:05:34.128Z",
          "confirmed": false,
          "confirmedOn": "2024-02-26T08:00:00.000Z",
          "cohort": [
              "2024"
          ],
          "notes": null
      },
      { 
          // other events
      }
  ]
}