refactor(inc, image-optimizer): restructure /inc architecture and standardize image optimizer module

- reorganized /inc directory structure for improved separation of concerns
  - grouped files into customizer, utilities, and tools
  - improved naming consistency across files (e.g. *-settings, template-tags, etc.)
  - simplified functions.php includes for better readability and maintainability

- refactored Customizer structure
  - extracted image optimizer settings from core-settings into dedicated module
  - consolidated settings, UI logic, and styles into a single feature file
  - improved naming consistency for hooks and functions

- standardized Image Optimizer admin tool
  - renamed "Performance Tools" to "Image Optimizer" across UI and hooks
  - updated admin page registration, callback names, and menu labels
  - aligned AJAX nonce naming for consistency and clarity

- preserved all existing logic and behavior (no functional changes)
- improved overall code organization and long-term maintainability

no breaking changes

style.css

@@ -247,6 +247,16 @@ textarea {
   margin: 0;
 }
 
+/* Article Justifiy */
+
+.entry-content p,
+.post-content p {
+    text-align: justify;
+    hyphens: auto;
+    word-break: normal;
+    overflow-wrap: break-word;
+}
+
 /* Header Wrapper */
 
 .header-wrapper {
@@ -997,7 +1007,7 @@ header.site-header .social-links svg:hover {
 }
 
 .site-header .search-field::placeholder {
-  color: var(--light-color) !important;
+  color: var(--dark-color)) !important;
   font-weight: 300;
 }
 
@@ -1275,33 +1285,6 @@ header.site-header .social-links svg:hover {
   }
 }
 
-/* Search Widget */
-
-.site-header .search-field:focus {
-  width: 320px;
-
-  background-color: rgba(255,255,255,0.85);
-  background-image: url(images/search-b.svg);
-
-  cursor: text;
-  outline: none;
-}
-
-@media (max-width: 500px) {
-  .site-header .search-field:focus {
-    width: 100%;
-  }
-}
-
-.site-header .search-field::placeholder {
-  color: var(--dark-color);
-  font-weight: 300;
-}
-
-.site-header .search-submit {
-  display: none;
-}
-
 /* Sidebar Search */
 
 .widget_search form {
@@ -1366,12 +1349,6 @@ header.site-header .social-links svg:hover {
   margin-bottom: var(--space-md);
 }
 
-.entry-content,
-.post-content,
-.inner-article-content {
-  max-width: 100%;
-}
-
 .single-post .entry-content > * + * {
   margin-top: var(--space-md);
 }
@@ -1582,7 +1559,6 @@ header.page-header h1 {
   display: flex;
   align-items: center;
   gap: 0.3rem;
-
   font-family: var(--primary-font);
   margin: 0.5rem 0;
 }
@@ -1590,7 +1566,7 @@ header.page-header h1 {
 .comments a {
   background: none;
   color: inherit;
-  transform: translateY(-1px);
+  transform: translateY(-0.5px);
 }
 
 .comments svg {