docs: add funding and support section

Author: wolph

.github/FUNDING.yml

@@ -1 +1,3 @@
-github: WoLpH
+github: wolph
+ko_fi: wolph_gh
+tidelift: pypi/progressbar2

README.md

@@ -409,3 +409,12 @@ existing projects.
 - Source: <https://github.com/wolph/python-progressbar>
 - Bug reports: <https://github.com/wolph/python-progressbar/issues>
 - Package homepage: <https://pypi.org/project/progressbar2/>
+
+## Support
+
+progressbar2 is maintained by [Rick van Hattem](https://github.com/wolph) in his own time. Most of that time goes on terminals nobody tests against and on keeping the bar out of your logging.
+
+If it saved you an afternoon, a tip covers an hour of issue triage:
+[Ko-fi](https://ko-fi.com/wolph_gh) or [GitHub Sponsors](https://github.com/sponsors/wolph).
+
+[![ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/wolph_gh)

docs/index.rst

@@ -52,3 +52,4 @@ real CPython compiled to WebAssembly, nothing installed.
 
    contributing
    history
+   sponsor

docs/sponsor.rst

@@ -0,0 +1,17 @@
+Support this project
+====================
+
+progressbar2 is maintained by `Rick van Hattem <https://github.com/wolph>`_ in
+his own time. Most of that time goes on terminals nobody tests against and on
+keeping the bar out of your logging.
+
+Maintenance is the unglamorous half of an open source package. It is invisible
+when it goes well, and the only feedback is silence.
+
+If the package saved you an afternoon, a tip covers an hour of issue triage.
+
+- `Ko-fi <https://ko-fi.com/wolph_gh>`_ for a one-off tip
+- `GitHub Sponsors <https://github.com/sponsors/wolph>`_ for a recurring one
+
+Nothing here buys a response time or a support contract. It buys hours on the
+parts of the package nobody else wants to look at.

pyproject.toml

@@ -113,6 +113,7 @@ dependencies = ['python-utils >= 3.8.1']
 bugs = 'https://github.com/wolph/python-progressbar/issues'
 documentation = 'https://progressbar-2.readthedocs.io/en/latest/'
 repository = 'https://github.com/wolph/python-progressbar/'
+Funding = 'https://github.com/sponsors/wolph'
 
 [project.scripts]
 progressbar = 'progressbar.__main__:main'