GSW-1844 refactor: query distributed amount for each targets (#449)

* fix: make setter to private
* feat: if amount did not distributed 100%, save for distributing it next time
* feat: map to avl.Tree
* feat: MintAndDistributeGns returns distributed amount
* feat: getter for each target's distributed and accu distributed amount

emission/_test_helper.gno

@@ -0,0 +1,44 @@
+package emission
+
+import (
+	"std"
+	"strconv"
+	"testing"
+
+	"gno.land/p/demo/avl"
+
+	"gno.land/r/gnoswap/v1/consts"
+	"gno.land/r/gnoswap/v1/gns"
+)
+
+var (
+	adminRealm     = std.NewUserRealm(consts.ADMIN)
+	stakerRealm    = std.NewCodeRealm(consts.STAKER_PATH)
+	govRealm       = std.NewCodeRealm(consts.GOV_GOVERNANCE_PATH)
+	govStakerRealm = std.NewCodeRealm(consts.GOV_STAKER_PATH)
+)
+
+func resetObject(t *testing.T) {
+	t.Helper()
+
+	distributionBpsPct = avl.NewTree()
+	distributionBpsPct.Set(strconv.Itoa(LIQUIDITY_STAKER), 7500)
+	distributionBpsPct.Set(strconv.Itoa(DEVOPS), 2000)
+	distributionBpsPct.Set(strconv.Itoa(COMMUNITY_POOL), 500)
+	distributionBpsPct.Set(strconv.Itoa(GOV_STAKER), 0)
+
+	distributedToStaker = 0
+	distributedToDevOps = 0
+	distributedToCommunityPool = 0
+	distributedToGovStaker = 0
+	accuDistributedToStaker = 0
+	accuDistributedToDevOps = 0
+	accuDistributedToCommunityPool = 0
+	accuDistributedToGovStaker = 0
+}
+
+func gnsBalance(t *testing.T, addr std.Address) uint64 {
+	t.Helper()
+
+	return gns.BalanceOf(a2u(addr))
+}