chore: repoint remaining links at git.swaits.com

Rewrites lingering github.com / *.sr.ht references to this Gitea instance,
translating GitHub and Sourcehut URL shapes to Gitea's (/blob/<ref>/ and
sr.ht /tree/<ref>/item/ -> /src/branch/<ref>/, /tree/<tag> -> /src/tag/<tag>,
/actions/workflows/X -> /actions?workflow=X, /edit/ -> /_edit/).

Left pointing at the old hosts on purpose: pull-request links (PRs were not
migrated), forks that were never migrated, and GitHub-only surfaces Gitea
lacks. OpenPGP identity proofs are untouched by design.

CHANGELOG.md

@@ -190,7 +190,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   `bootstrap`. All recipes execute inside `mise exec -- sh -eu -c` so the
   pinned toolchain is used regardless of shell activation state.
 
-[Unreleased]: https://github.com/swaits/jiggly/compare/v0.3.0...HEAD
-[0.3.0]: https://github.com/swaits/jiggly/compare/v0.2.0...v0.3.0
-[0.2.0]: https://github.com/swaits/jiggly/compare/v0.1.0...v0.2.0
-[0.1.0]: https://github.com/swaits/jiggly/releases/tag/v0.1.0
+[Unreleased]: https://git.swaits.com/swaits/jiggly/compare/v0.3.0...main
+[0.3.0]: https://git.swaits.com/swaits/jiggly/compare/v0.2.0...v0.3.0
+[0.2.0]: https://git.swaits.com/swaits/jiggly/compare/v0.1.0...v0.2.0
+[0.1.0]: https://git.swaits.com/swaits/jiggly/releases/tag/v0.1.0

Cargo.toml

@@ -5,7 +5,7 @@ edition     = "2024"
 authors     = ["Stephen Waits <steve@waits.net>"]
 description = "USB mouse jiggler firmware for the Seeed Studio Xiao RP2040 — keeps your screen awake during the workday, then politely shuts up so you can go home."
 license     = "MIT"
-repository  = "https://github.com/swaits/jiggly"
+repository  = "https://git.swaits.com/swaits/jiggly"
 readme      = "README.md"
 keywords    = ["embedded", "rp2040", "usb-hid", "embassy", "no-std"]
 categories  = ["embedded", "no-std"]