feat(whale-api): add GET api for on-chain governance (#1970)

<!--  Thanks for sending a pull request! -->

#### What this PR does / why we need it:
- Add `/proposals`, `/proposals/:id` and `/proposals/:id/votes`
endpoints on whale
- Add `.listGovProposals()`, `.getGovProposal()`, and
`listGovProposalVotes()` to `WhaleApiClient`
- To allow straightforward paginated listing implementation for
downstream, e.g. scan and wallet

#### Which issue(s) does this PR fixes?:
<!--
(Optional) Automatically closes linked issue when PR is merged.
Usage: `Fixes #<issue number>`, or `Fixes (paste link of issue)`.
-->
Fixes #

#### Additional comments?:
- Intermittent codecov issue when running CI, seems to be related to
codecov/codecov-action#598

Co-authored-by: Harsh <[email protected]>
Co-authored-by: Harsh R <[email protected]>

apps/whale-api/src/module.api/_module.ts

@@ -36,6 +36,8 @@ import { LegacySubgraphService } from './legacy.subgraph.service'
 import { PoolPairFeesService } from './poolpair.fees.service'
 import { ConsortiumController } from './consortium.controller'
 import { ConsortiumService } from './consortium.service'
+import { GovernanceController } from './governance.controller'
+import { GovernanceService } from './governance.service'
 
 /**
  * Exposed ApiModule for public interfacing
@@ -59,7 +61,8 @@ import { ConsortiumService } from './consortium.service'
     RawtxController,
     LoanController,
     LegacyController,
-    ConsortiumController
+    ConsortiumController,
+    GovernanceController
   ],
   providers: [
     {
@@ -104,7 +107,8 @@ import { ConsortiumService } from './consortium.service'
       inject: [ConfigService]
     },
     LegacySubgraphService,
-    ConsortiumService
+    ConsortiumService,
+    GovernanceService
   ],
   exports: [
     DeFiDCache