Add Project-Pro Blog module with initial SQL setup, CSS styles, and template files

- Created SQL installation scripts for categories and posts tables.
- Added uninstall scripts to drop the created tables.
- Introduced CSS styles for blog layout, including responsive design for posts and categories.
- Implemented PHP redirection in index files to prevent direct access.
- Developed Smarty templates for blog category tree, post list, and individual post details.
- Ensured proper caching headers in PHP files to enhance performance.

modules/projectproblog/sql/install.sql

@@ -0,0 +1,49 @@
+CREATE TABLE IF NOT EXISTS `PREFIX_projectproblog_category` (
+    `id_category`   INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+    `id_parent`     INT(10) UNSIGNED NOT NULL DEFAULT 0,
+    `active`        TINYINT(1) UNSIGNED NOT NULL DEFAULT 1,
+    `position`      INT(10) UNSIGNED NOT NULL DEFAULT 0,
+    `date_add`      DATETIME NOT NULL,
+    `date_upd`      DATETIME NOT NULL,
+    PRIMARY KEY (`id_category`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE IF NOT EXISTS `PREFIX_projectproblog_category_lang` (
+    `id_category`        INT(10) UNSIGNED NOT NULL,
+    `id_lang`            INT(10) UNSIGNED NOT NULL,
+    `name`               VARCHAR(255) NOT NULL,
+    `description`        TEXT,
+    `link_rewrite`       VARCHAR(255) NOT NULL,
+    `meta_title`         VARCHAR(255),
+    `meta_keywords`      VARCHAR(255),
+    `meta_description`   VARCHAR(512),
+    PRIMARY KEY (`id_category`, `id_lang`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE IF NOT EXISTS `PREFIX_projectproblog_post` (
+    `id_post`    INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+    `active`     TINYINT(1) UNSIGNED NOT NULL DEFAULT 1,
+    `thumbnail`  VARCHAR(255) DEFAULT NULL,
+    `date_add`   DATETIME NOT NULL,
+    `date_upd`   DATETIME NOT NULL,
+    PRIMARY KEY (`id_post`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE IF NOT EXISTS `PREFIX_projectproblog_post_lang` (
+    `id_post`            INT(10) UNSIGNED NOT NULL,
+    `id_lang`            INT(10) UNSIGNED NOT NULL,
+    `title`              VARCHAR(255) NOT NULL,
+    `intro`              TEXT,
+    `content`            LONGTEXT,
+    `link_rewrite`       VARCHAR(255) NOT NULL,
+    `meta_title`         VARCHAR(255),
+    `meta_keywords`      VARCHAR(255),
+    `meta_description`   VARCHAR(512),
+    PRIMARY KEY (`id_post`, `id_lang`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE IF NOT EXISTS `PREFIX_projectproblog_post_category` (
+    `id_post`     INT(10) UNSIGNED NOT NULL,
+    `id_category` INT(10) UNSIGNED NOT NULL,
+    PRIMARY KEY (`id_post`, `id_category`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;