feat: connectrpc and runtime context poc

[briangregoryholmes]

This PR is a rough demonstration of the structure necessary to move from Orval to connectrpc and, in turn, refactor our runtime context following the exploration in the discussion here: #8590.

For illustrative purposes, this PR specifically replaces the metricsViewAggregation and metricsViewTimeSeries queries used in the Leaderboard and MetricsTimeSeriesChart components respectively, highlighting usage of the suggested pattern both inside and outside of components.

Non-exhaustive to do list:

• Consider moving Project and client creation out of ProjectProvider and into a load function
• Scheduled project refetching
• Refetching of expired tokens
• Rough check of ProjectProvider structure to ensure it allows for arbitrarily switching between projects as well as rendering dashboards from two separate projects simultaneously
• Flesh out ProjectManager class
• Get input from platform about backend code gen (this PR is more about frontend consequences)
• How do we get code gen for the TanStack queries? May not be sustainable to do this manually, but there is no preexisting code-gen solution. See discussion here: feat: Extend connect-query-es to other Tanstack Query variants connectrpc/connect-query-es#324