internal/eval: replace geohash library with redis-like implementation…

… and finalize GEORADIUSBYMEMBER command

go.mod

@@ -43,7 +43,6 @@ require (
 	github.com/google/uuid v1.6.0
 	github.com/gorilla/websocket v1.5.3
 	github.com/mattn/go-sqlite3 v1.14.24
-	github.com/mmcloughlin/geohash v0.10.0
 	github.com/ohler55/ojg v1.25.0
 	github.com/rs/xid v1.6.0
 	github.com/rs/zerolog v1.33.0

go.sum

@@ -74,8 +74,6 @@ github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWE
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-sqlite3 v1.14.24 h1:tpSp2G2KyMnnQu99ngJ47EIkWVmliIizyZBfPrBWDRM=
 github.com/mattn/go-sqlite3 v1.14.24/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
-github.com/mmcloughlin/geohash v0.10.0 h1:9w1HchfDfdeLc+jFEf/04D27KP7E2QmpDu52wPbJWRE=
-github.com/mmcloughlin/geohash v0.10.0/go.mod h1:oNZxQo5yWJh0eMQEP/8hwQuVx9Z9tjwFUqcTB1SmG0c=
 github.com/ohler55/ojg v1.25.0 h1:sDwc4u4zex65Uz5Nm7O1QwDKTT+YRcpeZQTy1pffRkw=
 github.com/ohler55/ojg v1.25.0/go.mod h1:gQhDVpQLqrmnd2eqGAvJtn+NfKoYJbe/A4Sj3/Vro4o=
 github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=