DOC: Add What's New entry for complex text layout

Author: QuLogic

doc/users/next_whats_new/libraqm.rst

@@ -0,0 +1,42 @@
+Complex text layout with libraqm
+--------------------------------
+
+Text support has been extended to include complex text layout. This support includes:
+
+1. Languages that require advanced layout, such as Arabic or Hebrew.
+2. Text that mixes left-to-right and right-to-left languages.
+
+   .. plot::
+       :show-source-link: False
+
+       text = 'Here is some رَقْم in اَلْعَرَبِيَّةُ'
+       fig = plt.figure(figsize=(6, 1))
+       fig.text(0.5, 0.5, text, size=32, ha='center', va='center')
+
+3. Ligatures that combine several adjacent characters for improved legibility.
+
+   .. plot::
+       :show-source-link: False
+
+       text = 'f\N{Hair Space}f\N{Hair Space}i \N{Rightwards Arrow} ffi'
+       fig = plt.figure(figsize=(3, 1))
+       fig.text(0.5, 0.5, text, size=32, ha='center', va='center')
+
+4. Combining multiple or double-width diacritics.
+
+   .. plot::
+       :show-source-link: False
+
+       text = (
+           'a\N{Combining Circumflex Accent}\N{Combining Double Tilde}'
+           'c\N{Combining Diaeresis}')
+       text = ' + '.join(
+           c if c in 'ac' else f'\N{Dotted Circle}{c}'
+           for c in text) + f' \N{Rightwards Arrow} {text}'
+       fig = plt.figure(figsize=(6, 1))
+       fig.text(0.5, 0.5, text, size=32, ha='center', va='center',
+                # Builtin DejaVu Sans doesn't support multiple diacritics.
+                family=['Noto Sans', 'DejaVu Sans'])
+
+Note, all advanced features require corresponding font support, and may require
+additional fonts over the builtin DejaVu Sans.