New SongView, UV & More (#6)

Honestly, I don't remember everything I've done in this branch.

Important things:
 - Started using UV for dependency / python version management
 - Fixed the stupid queue skipping bug (still can't believe it was a race condition)
 - New SongView widget that multiple screens share
 - New features on most views with songs!
   - Songs can be shared
   - Songs can be added to playlists
   - Songs can be rated
 - Upgraded my Navidrome server version & had to change some stuff for it

Co-authored-by: Jackson Hodge <jackson.d.hodge@jbhunt.com>
Reviewed-on: #6

main.tcss

@@ -169,6 +169,48 @@ QueueScreen {
     border: grey;
 }
 
+PlaylistSelectionModal {
+    align: center middle;
+}
+
+PlaylistSelectionModal Container {
+    height: 75%;
+    width: 75%;
+    border: grey;
+}
+
+PlaylistSelectionModal Label {
+    text-style: bold;
+    color: #0073e6;
+    width: 100%;
+    text-align: center;
+}
+
+PlaylistNameForm {
+    align: center middle;
+}
+
+#PSbutton {
+    width: 100%;
+    align: right middle;
+}
+
+PlaylistNameForm Button {
+    background: #0080ff;
+}
+
+PlaylistNameForm Label {
+    width: 100%;
+    text-align: center;
+}
+
+#playlistFormModal {
+    height: 30%;
+    width: 70%;
+    border: grey;
+    align: center middle;
+}
+
 #songModeSelectorList {
     height: 100%;
     width: 0.2fr;
@@ -203,3 +245,56 @@ QueueScreen {
     margin: 1 1;
 }
 
+SongTable Input {
+    display: none;
+}
+
+ShareLinkModal {
+    align: center middle;
+}
+
+ShareLinkModal Horizontal {
+    min-width: 30%;
+    min-height: 3;
+    max-height: 5;
+    width: auto;
+    height: auto;
+    border: blue;
+}
+
+ShareLinkModal Label {
+    content-align: center middle;
+    padding: 1 2 1 2;
+}
+
+RatingModal {
+    align: center middle;
+}
+
+RatingModal Vertical {
+    max-width: 50%;
+    width: auto;
+    height: auto;
+    padding: 2;
+    border: blue;
+    align: center middle;
+}
+
+RatingModal Label {
+    content-align: center middle;
+    width: 100%;
+    padding-bottom: 2;
+}
+
+RatingModal Horizontal {
+    align: center middle;
+    height: auto;
+}
+
+RatingModal RadioSet {
+    width: 40%;
+}
+
+RatingModal Button {
+    
+}