A server-side Fabric/Quilt mod that adds /warp command-set.
Works for Minecraft 1.16.2+ (snapshots not fully tested)
Requires FabricAPI

• /warp <destination> - Teleports you to the destination
  Permission: fabricwarps.warp | Default: True

• /warps - Alias for /warps list
/warps list [<dimension>] - Lists all warps for the specified dimension or all dimensions
  Permission: fabricwarps.warps.list | Default: True

• /warps add <name> [<x y z> [<yaw pitch> [<dimension>]]] - creates a new warp destination using your coordinates/rotation/dimension if they're not provided
  Permission: fabricwarps.warps.add | Default: Level 2

• /warps warp_player <player> <name> - warps a player to the specified warp destination
  Permission: fabricwarps.warps.warp_player | Default: Level 2

• /warps remove <name> - removes a warp destination with the name
  Permission: fabricwarps.warps.remove | Default: Level 2

• /warps config [<name> [<value>]] - sets or gets a config value
  Permission: fabricwarps.config | Default: Level 2

Permission fabricwarps.warps will grant permission to all /warps subcommands.

Can be found in config/FabricWarps.properties.
Configuring through commands automatically rewrites the file.

cooldown - The minimum time between warping. Default: 15 (seconds)
bossbar - Whether to enable the boss bar indication for standing still, if set to false will use action bar for time. Default: true
stand-still - How long should the player stand still for after accepting a tpa or tpahere request. Default: 5 (seconds)