docs,epic(indexer-nibi): Add usage examples for all queries

[Unique-Divine]

Queries to Create Examples For

• Link to Examples in this ticket: ___
• Document an example with a WHERE clause
• Document an IBC example and explain the response

Child Tickets [From 2023]

• feat(indexer-nibi): query balances
• feat(indexer-nibi): query fundingRates #97
• feat(indexer-nibi): query liquidations #98
• feat(indexer-nibi): Add markPriceCandles query #91
• feat(indexer-nibi): query markPrices #96
• feat(indexer-nibi): query oraclePrices #121
• feat(indexer-nibi): query positionChanges
• feat(indexer-nibi): query positions
• feat(indexer-nibi): query statsVolume
• feat(indexer-nibi): query transfers #95
• feat(indexer-nibi): query txMessages #93
• feat(indexer-nibi): query txMessagesFailed #94
• feat(indexer-nibi): query unbondings
• feat(indexer-nibi): query validators
• feat(indexer-nibi): query vpoolConfigs

[cgilbe27]

Reopening as I still think having something like this is useful

[Unique-Divine]

Maybe a good way to handle this is to aim first for documenting examples of patterns that are common across many queries. For example, we could show a few examples on:

• Queries with unintuitive WHERE clauses
• Queries related to IBC
• Queries that we expect to be most common, such as balance queries and tx history