Add Bengali translation for SemVer documentation (Resolves #417)

TRANSLATORS.md

@@ -33,3 +33,7 @@ This file contains the translation contributors who are willing to help translat
 ## Tamil
 
 - [@sathishs4r](https://github.com/sathishs4r)
+
+## Bangla/Bengali
+
+- [@forhadakhan](https://github.com/forhadakhan)

_config.yml

@@ -38,6 +38,7 @@ languages:
   ro: Română
   da: Dansk
   el: Ελληνικά
+  bn: বাংলা
 versions:
   - 2.0.0
   - 2.0.0-rc.2

css/lang/bn.css

@@ -0,0 +1,54 @@
+/* Load from Google Fonts */
+@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+Bengali:wght@300;400;500;700&display=swap');
+
+/* CSS variables for easy adjustment */
+:root {
+    --bn-sans: 'Noto Sans Bengali', 'Noto Sans', system-ui, -apple-system, "Segoe UI",
+        Roboto, "Helvetica Neue", Arial, sans-serif;
+    --bn-base-size: 16px;
+    --bn-line-height: 1.45;
+}
+
+/* Global defaults — set the default font family and basic typographic rules */
+html, body {
+    font-family: var(--bn-sans) !important;
+    font-size: var(--bn-base-size);
+    line-height: var(--bn-line-height);
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+    text-rendering: optimizeLegibility;
+    color: inherit;
+}
+
+/* Headings, paragraphs, lists — inherit the Bengali UI font */
+h1, h2, h3, h4, h5, h6,
+p, blockquote, ul, ol, li, dl, dt, dd {
+    margin: 0;
+    font-family: var(--bn-sans) !important;
+}
+
+/* Slightly increased line-height for headings for Bengali readability */
+h1, h2, h3, h4, h5, h6 {
+    line-height: 1.25;
+}
+
+/* Utility: apply font specifically for elements marked as Bengali content
+   (useful when a page is multilingual). Prefer this to global override if possible. */
+:lang(bn),
+[lang="bn"],
+[data-lang="bn"] {
+    font-family: var(--bn-sans) !important;
+}
+
+/* Form controls — ensure Bengali font is applied */
+input, textarea, select, button, optgroup, option {
+    font-family: var(--bn-sans) !important;
+    font-size: 1rem;
+    line-height: var(--bn-line-height);
+}
+
+/* Code and monospace elements — keep standard monospace fonts */
+code, pre, kbd, samp {
+    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono",
+                 "Courier New", monospace;
+}