weather: add plugin

This plugin fetches weather information in the same fashion as
Xmobar's Weather plugin. It fetches from NOAA's website (by default)
using their standard format for reporting data from weather stations
around the world.

Also enable in CI.

TODO:

Fill out the example configuration in the docfile.

modules/meson.build

@@ -60,6 +60,9 @@ plugin_xkb_enabled = backend_x11 and xcb_xkb.found()
 
 plugin_xwindow_enabled = backend_x11 and get_option('plugin-xwindow').allowed()
 
+curl = dependency('libcurl', required: get_option('plugin-weather'))
+plugin_weather_enabled = curl.found() and get_option('plugin-weather').allowed()
+
 # Module name -> (source-list, dep-list)
 mod_data = {}
 
@@ -144,6 +147,14 @@ if plugin_niri_workspaces_enabled
   mod_data += {'niri-workspaces': [['niri-common.c', 'niri-common.h'], [dynlist, json_niri_workspaces]]}
 endif
 
+if plugin_weather_enabled
+  mod_data += {'weather': [['weather-parse.c'], [curl]]}
+
+  e = executable('test-weather', ['test-weather.c', 'weather-parse.c'],
+                 dependencies: [pixman, fcft, tllist, curl])
+  test('module-weather', e)
+endif
+
 if plugin_xkb_enabled
   mod_data += {'xkb': [[], [xcb_stuff, xcb_xkb]]}
 endif