feat(store): add local snapshots management commands

[VictorTrustyDev]

Read details help: evmd snapshots --help

Or here:

How to use "evmd snapshot" command:

In this context, we gonna to export snapshot for height 100000

1. Create state-sync snapshot on a running node with "export"
> sudo systemctl stop evmd
> evmd snapshots export --height 100000
You gonna get state-sync snapshot at ".evermint/snapshots/" dir as usual:
> Log: Snapshot created at height 100000, format 3, chunks 10

2. Pack snapshot with "dump":
> evmd snapshots dump 100000 3
You gonna get "100000-3.tar.gz" at current working directory

3. Share to another node or reset data of current node with "unsafe-reset-all"

4. Unsafe-reset the node and unpack snapshot with "load":
> evmd snapshots load 100000-3.tar.gz

5. Then restore app state with "restore":
> evmd snapshots restore 100000 3
You gonna get "data/application.db" unpacked

6. Now bootstrap state with "bootstrap-state":
evmd tendermint bootstrap-state