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/aliases.config

@@ -0,0 +1,24 @@
+db-anon-role = "required"
+db-channel = "pgrst"
+db-channel-enabled = false
+db-extra-search-path = "public"
+db-max-rows = 1000
+db-pool = 10
+db-pool-timeout = 10
+db-pre-request = "check_alias"
+db-prepared-statements = true
+db-root-spec = "open_alias"
+db-schemas = "provided_through_alias"
+db-tx-end = "commit"
+db-uri = "required"
+jwt-aud = ""
+jwt-role-claim-key = ".\"aliased\""
+jwt-secret = ""
+jwt-secret-is-base64 = true
+log-level = "error"
+openapi-server-proxy-uri = ""
+raw-media-types = ""
+server-host = "!4"
+server-port = 3000
+server-unix-socket = ""
+server-unix-socket-mode = "660"