docs: Add sponsor page

ci/generate-docs.py

@@ -478,6 +478,7 @@ TOC = [
         ],
     ),
     Page("Change Log", "changelog.md"),
+    Page("Sponsor", "sponsor.md"),
 ]
 
 os.chdir("docs")

docs/sponsor.md

@@ -0,0 +1,29 @@
+# Sponsoring
+
+If you use and find wezterm valuable, please consider sponsoring its
+development.
+
+Your support helps to validate the time spent so far and encourages me to spend
+more time working on it in the future, keeping the project alive and current.
+
+It may not be readily apparent, but maintaining software that runs across
+multiple different operating systems and graphical environments is particularly
+labor intensive.
+
+Add to that the time it takes to triage and respond to questions and issues on
+GitHub and Element, and that's a significant amount of time and energy just to
+keep things ticking over, even without adding new features or making
+significant improvements.
+
+It feels like a full time job, but with your support, maybe it could
+actually be a full time job?
+
+If you are in a position to provide recurring or even a one-time sponsorship,
+I would appreciate it.
+
+You can find me on the following platforms:
+
+[:simple-githubsponsors: GitHub](https://github.com/sponsors/wez){ .md-button }
+[:simple-patreon: Patreon](https://patreon.com/WezFurlong){ .md-button }
+[:simple-kofi: Ko-Fi ](https://ko-fi.com/wezfurlong){ .md-button }
+[:simple-liberapay: Liberapay](https://liberapay.com/wez){ .md-button }