feat: renamed config options with prefixes; added aliases for old names

* secret-is-base64 -> jwt-secret-is-base64
* role-claim-key -> jwt-role-claim-key
* max-rows -> db-max-rows
* pre-request -> db-pre-request
* root-spec -> db-root-spec
* db-schema -> db-schemas

This is not a breaking change, because aliases are added as well.

refactor: sorted all config keys alphabetically where applicable

test/io-tests/configs/expected/defaults.config

@@ -1,24 +1,24 @@
-db-uri = "required"
-db-schema = "required"
 db-anon-role = "required"
-db-pool = 10
-db-pool-timeout = 10
-db-extra-search-path = "public"
 db-channel = "pgrst"
 db-channel-enabled = false
-db-tx-end = "commit"
+db-extra-search-path = "public"
+db-max-rows = ""
+db-pool = 10
+db-pool-timeout = 10
+db-pre-request = ""
 db-prepared-statements = true
+db-root-spec = ""
+db-schemas = "required"
+db-tx-end = "commit"
+db-uri = "required"
+jwt-aud = ""
+jwt-role-claim-key = ".\"role\""
+jwt-secret = ""
+jwt-secret-is-base64 = false
+log-level = "error"
+openapi-server-proxy-uri = ""
+raw-media-types = ""
 server-host = "!4"
 server-port = 3000
 server-unix-socket = ""
 server-unix-socket-mode = "660"
-openapi-server-proxy-uri = ""
-jwt-secret = ""
-jwt-aud = ""
-secret-is-base64 = false
-role-claim-key = ".\"role\""
-max-rows = ""
-pre-request = ""
-root-spec = ""
-raw-media-types = ""
-log-level = "error"