feat: sql handlers for custom media types

* test text/html and drop HtmlRawOutputSpec.hs
* all tests passing, removed all pendingWith
* make functions compatible with pg <= 12
* move custom media types tests to own spec
* anyelement aggregate
* apply aggregates without a final function
* overriding works
* overriding anyelement with particular agg
* cannot override vendored media types
* plan spec works with custom aggregate
* renamed media types to make clear which ones are overridable
* correct content negotiation with same weight
* text/tab-separated-values media type
* text/csv with BOM plus content-disposition header

CHANGELOG.md

@@ -14,11 +14,19 @@ This project adheres to [Semantic Versioning](http://semver.org/).
  - #2943, Add `handling=strict/lenient` for Prefer header - @taimoorzaeem
  - #2983, Add more data to `Server-Timing` header - @develop7
  - #2441, Add config `server-cors-allowed-origins` to specify CORS origins - @taimoorzaeem
+ - #2825, SQL handlers for custom media types - @steve-chavez
+  - Solves #1548, #2699, #2763, #2170, #1462, #1102, #1374, #2901
 
 ### Fixed
 
  - #3015, Fix unnecessary count() on RPC returning single - @steve-chavez
 
+### Changed
+
+ - Removed [raw-media-types config](https://postgrest.org/en/v11.1/references/configuration.html#raw-media-types) - @steve-chavez
+ - Removed `application/octet-stream`, `text/plain`, `text/xml` [builtin support for scalar results](https://postgrest.org/en/v11.1/references/api/resource_representation.html#scalar-function-response-format) - @steve-chavez
+ - Removed default `application/openapi+json` media type for [db-root-spec](https://postgrest.org/en/v11.1/references/configuration.html#db-root-spec) - @steve-chavez
+
 ## [11.2.2] - 2023-10-25
 
 ### Fixed
@@ -86,14 +94,6 @@ This project adheres to [Semantic Versioning](http://semver.org/).
    + The `/table?select=*,other!fk(*)` must be used to disambiguate
    + The server aids in choosing the `!fk` by sending a `hint` on the error whenever an ambiguous request happens.
 
-### Changed
-
- - #1462, #1548, Removed [raw-media-types config](https://postgrest.org/en/v11.1/references/configuration.html#raw-media-types) - @steve-chavez
-   + Can be replaced with custom media types
- - #1462, #1548, Removed `application/octet-stream`, `text/plain`, `text/xml` [builtin support for scalar results](https://postgrest.org/en/v11.1/references/api/resource_representation.html#scalar-function-response-format) - @steve-chavez
-   + Can be replaced with custom media types
- - #1462, #1548, Removed default `application/openapi+json` media type for [db-root-spec](https://postgrest.org/en/v11.1/references/configuration.html#db-root-spec) - @steve-chavez
-
 ## [11.1.0] - 2023-06-07
 
 ### Added