Move timestamps to ISO strings in lists

[joanagmaia]

Changes proposed ✍️

• Updated requests for "View more" in Members and Organizations dashboard to be between 2 dates. Exactly the same dates we apply on the dashboard's widgets
• Updated date.filter.renderer.ts to properly parse values according to the operator. gt and between operators were using "YYYY-MM-DD" format which was requesting for the wrong periods. Currently we always send in ISO to backend and display in "YYYY-MM-DD" for frontend

What

🤖 Generated by Copilot at e8c17bd

The pull request updates the dashboard components and the date filter renderer to support more flexible and accurate filtering of data by date ranges. It uses a computed property periodRange and a new operator between to create and apply date filters for the allMembers and allOrganizations queries. It also modifies the dateApiFilterRenderer function to handle different date operators.
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🤖 Generated by Copilot at e8c17bd

Sing, O Muse, of the skillful coder who refined the dashboard view
With cunning logic and periodRange, he filtered data anew
By joinedDate and lastActivityDate, he sorted members and organizations
Like Zeus who rules the seasons and the years, he wielded the between operator

Why

How

🤖 Generated by Copilot at e8c17bd

• Changed the filters for the joinedDate and lastActivityDate properties of the allMembers and allOrganizations queries to use the between operator and the periodRange value instead of the greater than operator and the periodStartDate value. This allows the dashboard to show the members and organizations who joined or were active within the selected period, instead of only those who joined or were active after the start of the period. (link, link, link, link)
• Replaced the computed property periodStartDate by the computed property periodRange, which returns an array of two dates: the start and the end of the selected period. This provides the periodRange value for the filters that use the between operator. (link, link)
• Modified the dateApiFilterRenderer function to handle the between and not between operators for the date filters. The function now creates a filter object with an array of two dates: the start and the end of the day for each value in the input array. This allows the filters to use the between and not between operators for the date properties. (link)

Checklist ✅

• Label appropriately with Feature, Improvement, or Bug.
• Add screehshots to the PR description for relevant FE changes
• New backend functionality has been unit-tested.
• API documentation has been updated (if necessary) (see docs on API documentation).
• Quality standards are met.

[yeganathan18]

LGTM 🚀