feat(gnodev): lazy loading & staging support (#3237)

featuring:  
- [X] **Lazy reload**: Super fast reload, only loading the needed
packages for the current directory package.
- [x] **Chain resolver**: You can change the gnodev resolving process so
it can resolve packages on-chain and configure a local fallback,
allowing you to try your package against the chain before submitting it.
	-  This will probably be updated when #2932 & #3123 will be merged
- [x] **Staging Mode**: `gnodev` now starts from the current directory
by default. The staging subcommand will reproduce previous behaviors by
loading and monitoring the entire example folder.

<details><summary>Contributors' checklist...</summary>

- [ ] Added new tests, or not needed, or not feasible
- [ ] Provided an example (e.g. screenshot) to aid review or the PR is
self-explanatory
- [ ] Updated the official documentation or not needed
- [ ] No breaking changes were made, or a `BREAKING CHANGE: xxx` message
was included in the description
- [ ] Added references to related issues and PRs
- [ ] Provided any useful hints for running manual tests
</details>

---------

Signed-off-by: gfanton <8671905+gfanton@users.noreply.github.com>
Co-authored-by: Leon Hudak <33522493+leohhhn@users.noreply.github.com>
Co-authored-by: Morgan <git@howl.moe>
Co-authored-by: Morgan <morgan@morganbaz.com>

contribs/gnodev/cmd/gnodev/accounts.go

@@ -49,7 +49,7 @@ func (va varPremineAccounts) String() string {
 	return strings.Join(accs, ",")
 }
 
-func generateBalances(bk *address.Book, cfg *devCfg) (gnoland.Balances, error) {
+func generateBalances(bk *address.Book, cfg *AppConfig) (gnoland.Balances, error) {
 	bls := gnoland.NewBalances()
 	premineBalance := std.Coins{std.NewCoin(ugnot.Denom, 10e12)}