add(examples/styles): text and color styling possiblities

This also contains some minor refactoring to improve the readability
and understandability of the library (i.e. renaming of Style.Attributes
to Style.Emphasis).

README.md

@@ -90,19 +90,12 @@ the primary use-case for myself to create this library in the first place.
       - [x] horizontal
     - [x] padding
     - [x] gap
-    - [x] sizing (removed - for now at least)
-      - width
-      - height
-      - options
-        - fit
-        - grow
-        - fixed
-        - percent
   - [x] Border
     - [x] sides
     - [x] corners
     - [x] separators
   - [x] Rectangle
+  - [x] min size
   - [ ] User control
     - [x] event loop handling
       - [x] mouse support
@@ -124,7 +117,7 @@ the primary use-case for myself to create this library in the first place.
       - [ ] image support through kitty protocol (**later**)
   - [ ] Inline rendering (**later**)
 - [ ] Examples
-  - [ ] Layouts
+  - [x] Layouts
     - [x] vertical
     - [x] horizontal
     - [x] grid
@@ -138,6 +131,21 @@ the primary use-case for myself to create this library in the first place.
       - [x] mouse scrolling aware of mouse position (i.e. through multiple different scrollable `Container`)
   - [ ] Styles
     - [ ] Text styles
+      - [ ] Colors
+        - [x] forground
+        - [x] background
+        - [ ] underline
+      - [ ] Emphasis
+        - [x] none
+        - [x] bold
+        - [x] dim
+        - [x] italic
+        - [x] underline
+        - [x] blink
+        - [x] invert
+        - [x] hidden
+        - [x] strikethrough
+        - [ ] combinations
     - [x] Color palette
   - [ ] Error Handling
     - [ ] log and show error's without crashing the application