feat: add workboard_get_team_objectives_tool for date-range-scoped OKR snapshots#24

ghelleks wants to merge 2 commits into

crunchtools:maincrunchtools/mcp-workboard:mainfrom

ghelleks:feat/team-objectives-date-rangeghelleks/mcp-workboard:feat/team-objectives-date-rangeCopy head branch name to clipboard