feat(commands): add base command aliases

design/user-stories/us-001-unlock-and-establish-base.md

@@ -17,6 +17,7 @@ As a **player**, I want to earn and set a personal base so that later quality-of
 - [x] Player-placed blocks may contribute when broken; natural-generation detection is not required.
 - [x] Base I unlocks when the player reaches the configured threshold, which defaults to 250 qualifying blocks.
 - [x] `/setbase` is unavailable before Base I and explains the unmet requirement.
+- [x] `/sethome` is an alias for `/setbase` with identical behavior.
 - [x] After Base I unlocks, `/setbase` records the player's current world and block location as the center of a cylindrical base.
 - [x] The initial cylinder has a configurable 10-block horizontal radius and extends a configurable 25 blocks above and 25 blocks below the set Y coordinate.
 - [x] The first successful `/setbase` is immediately available.

design/user-stories/us-005-unlock-base-teleportation.md

@@ -15,6 +15,7 @@ As a **player with Base II**, I want to earn `/base` so that I can return safely
 - [x] Only placements made in Survival mode and within the base's current horizontal and vertical bounds count.
 - [x] Player-placed blocks and replacement of previously broken blocks may contribute repeatedly.
 - [x] Base III unlocks `/base` with a configurable 30-second warm-up and three-hour cooldown by default.
+- [x] `/home` is an alias for `/base`, including `/home upgrade`.
 - [x] Looking around without changing block coordinates does not cancel the warm-up.
 - [x] Changing block X, Y, or Z, taking damage, teleporting, changing worlds, dying, disconnecting, or starting a conflicting teleport cancels the warm-up.
 - [x] Cancellation clearly informs the player and does not consume the cooldown.

design/user-stories/us-008-unlock-visitor-access.md

@@ -18,6 +18,7 @@ As a **player with Base III**, I want to open my base to visitors so that other
 - [x] `/basevisitors` lets a Base IV owner toggle visitor access on and off.
 - [x] The visitor-access preference persists across reconnects and restarts.
 - [x] `/gotobase <owner>` autocompletes bases that the requesting player is currently eligible to visit.
+- [x] `/visit <owner>` aliases `/gotobase <owner>` with identical autocomplete, including eligible bases whose owners are offline.
 - [x] Enabled bases remain visitable while their owners are offline.
 - [x] A visitor teleport uses the destination owner's current warm-up tier.
 - [x] Looking around is permitted, while movement between block coordinates, damage, teleportation, world change, death, logout, or a conflicting teleport cancels the visitor warm-up.