ES-compatible API

[guilload]

Endpoints:

• [x] https://github.com/quickwit-oss/quickwit/issues/2656
• [x] _msearch endpoint
• [x] https://github.com/quickwit-oss/quickwit/issues/2770 (high priority)
• [x] #3527
• [x] #3526
• [x] #3525

Search parameters:

• [x] https://github.com/quickwit-oss/quickwit/issues/3551 (high priority)
• [x] https://github.com/quickwit-oss/quickwit/issues/2670 (high priority)
• [x] #3310
• [x] #3523 (under discussion)

Query DSL:

• [x] #3263 (high priority)
• [x] Query string with lenient, default_field, fields params (high priority)
• [x] Multi-match query with [phrase_prefix, phrase] type, lenient (high priority)
• [ ] Terms query note this is mildly different from term query. (s) (high priority) ~~- [Multi-match query with analyze_wildcard + analyzer (under discussion)~~
• [x] Match all {"match_all": {}}
• [x] https://github.com/quickwit-oss/quickwit/issues/2657
• [x] Query string
• [x] Match query
• [x] #2266
• [x] Range query
• [x] Sort

Aggregation DSL:

• [x] Date histogram
• [x] Histogram
• [x] Percentiles aggregation
• [x] Terms aggregation
• [x] Stats aggregation

Other missing elastic features that we might discuss:

• [x] Support sort on multiple fields & different types of sort https://www.elastic.co/guide/en/elasticsearch/reference/8.6/sort-search-results.html (under discussion)
• [ ] Support selecting/excluding specific document source fields to display (under discussion)