[UI] Make experiment run table configurable with custom attributes

[huikan-tfc]

The experiment run table currently displays only a fixed set of columns: name, tags, and status. We need the ability to configure which attributes appear as columns.

Current Behavior:

• Run table shows fixed columns: name, tags, status
• No way to add custom attributes as columns
• Important metadata (e.g., job IDs, usernames) requires clicking into each run

Desired Behavior:

• Allow users to select which attributes appear as table columns
• Support common attributes out of the box:
  • Trainy job ID
  • User name
  • Experiment config (e.g., model type, dataset)
  • Hardware info (GPU type, node count)
• Persist column configuration per user/project
• Enable sorting and filtering by custom columns

[asaiacai]

we've added a notes table for adding notes via the UI. WIP for displaying arbitrary columns for configs and metrics.

[asaiacai]

metrics and configs added