Make flake self-contained - consolidate installer-replication

BREAKING CHANGE: Remove external dots-hyprland dependency

- Imported all essential configs from dots-hyprland/installer-replication
- Added complete configs/ directory with:
  - hypr/ - Hyprland configuration
  - quickshell/ - Quickshell widgets and config
  - applications/ - Application configurations
  - scripts/ - Utility scripts
  - matugen/ - Material You theming
- Updated flake.nix to use local ./configs instead of external repo
- Simplified update-flake script (removed external repo management)
- Updated README to reflect self-contained architecture
- All builds pass with local configurations

Benefits:
- No external repository dependencies
- Faster builds (no network dependencies)
- Version controlled configs in single repo
- Easier maintenance and development
- Complete installer replication in one place

configs/matugen/templates/hyprland/hyprlock.conf

@@ -0,0 +1,71 @@
+# Material You themed Hyprlock configuration
+
+$text_color = rgba({{colors.on_background.default.hex_stripped}}FF)
+$entry_background_color = rgba({{colors.surface_variant.default.hex_stripped}}11)
+$entry_border_color = rgba({{colors.outline.default.hex_stripped}}55)
+$entry_color = rgba({{colors.on_surface_variant.default.hex_stripped}}FF)
+$font_family = Rubik Light
+$font_family_clock = Rubik Light
+
+background {
+    color = rgba({{colors.background.default.hex_stripped}}FF)
+    path = screenshot
+    blur_passes = 3
+    blur_size = 8
+}
+
+input-field {
+    monitor =
+    size = 250, 50
+    outline_thickness = 2
+    dots_size = 0.1
+    dots_spacing = 0.3
+    outer_color = $entry_border_color
+    inner_color = $entry_background_color
+    font_color = $entry_color
+    fade_on_empty = true
+    placeholder_text = <i>Password...</i>
+    check_color = rgba({{colors.primary.default.hex_stripped}}FF)
+    fail_color = rgba({{colors.error.default.hex_stripped}}FF)
+    fail_text = <i>$FAIL <b>($ATTEMPTS)</b></i>
+
+    position = 0, 20
+    halign = center
+    valign = center
+}
+
+# Time
+label {
+    monitor =
+    text = cmd[update:30000] echo "$(date +"%R")"
+    color = $text_color
+    font_size = 90
+    font_family = $font_family_clock
+    position = -30, 0
+    halign = right
+    valign = top
+}
+
+# Date  
+label {
+    monitor =
+    text = cmd[update:43200000] echo "$(date +"%A, %d %B %Y")"
+    color = $text_color
+    font_size = 25
+    font_family = $font_family
+    position = -30, -150
+    halign = right
+    valign = top
+}
+
+# User
+label {
+    monitor =
+    text = Hi there, $USER
+    color = $text_color
+    font_size = 20
+    font_family = $font_family
+    position = 0, 100
+    halign = center
+    valign = center
+}