- Implemented configurable public URL rewriting.

What changed:
Added pretty URL helpers/default setting in 
[includes/db.php](/Users/tyemeclifford/Documents/GH/mediaplayer/includes/db.php).
Added root rewrite rules in 
[.htaccess](/Users/tyemeclifford/Documents/GH/mediaplayer/.htaccess):/v/<slug>
/all
/search/<query>

Added Admin → Settings “Public URL Style” toggle in 
[admin/settings.php](/Users/tyemeclifford/Documents/GH/mediaplayer/admin/settings.php), 
defaulting to pretty URLs.
Updated public/player/catalogue/embed/admin preview links to use the 
configured URL style.
Added redirects from legacy ?v= and ?q= URLs to pretty routes when 
rewriting is enabled.
Documented deployment and fallback behavior in 
[README.md](/Users/tyemeclifford/Documents/GH/mediaplayer/README.md).

.htaccess

@@ -0,0 +1,10 @@
+DirectoryIndex index.php
+
+<IfModule mod_rewrite.c>
+  RewriteEngine On
+
+  RewriteRule ^v/([^/]+)/?$ index.php?v=$1 [B,L,QSA]
+  RewriteRule ^all/?$ catalogue.php [L,QSA]
+  RewriteRule ^search/?$ catalogue.php [L,QSA]
+  RewriteRule ^search/(.+)/?$ catalogue.php?q=$1 [B,L,QSA]
+</IfModule>