feat: find element in jsonb by path is works!!!

package/c/hemar/hemar--0.1.sql

@@ -2,31 +2,14 @@
 \echo Use "CREATE EXTENSION hemar" to load this file. \quit
 
 CREATE SCHEMA hemar;
-
--- Define the template rendering functions using hectic library
--- Expected usage:
---   ```sql
---    SELECT "hemar"."render"(
---      "declare" := 
---        jsonb_build_object(
---          'name', 'test',
---          'config', jsonb_build_object(
---            'debug', true,
---            'limit', 100
---          )
---        ),
---      "template" := $hemar$
---        {{ name }} {{ config.limit }}
---      $hemar$
---    ); 
---   ```
-CREATE FUNCTION "hemar"."render"("declare" jsonb, "template" text)
-RETURNS text
-LANGUAGE C STRICT
-AS 'hemar', 'pg_render';
-
 -- Parse function returns the structure of a template for debugging
 CREATE FUNCTION "hemar"."parse"("template" text)
 RETURNS text
 LANGUAGE C STRICT
 AS 'hemar', 'pg_template_parse';
+
+-- JSONB path access function
+CREATE FUNCTION "hemar"."jsonb_get_by_path"("json" jsonb, "path" text)
+RETURNS jsonb
+LANGUAGE C STRICT
+AS 'hemar', 'pg_jsonb_get_by_path';