chore: move hof under r/leon (gnolang#3167)

<!-- please provide a detailed description of the changes made in this
pull request. -->

## Description

Moves `r/demo/hof` under `r/leon`. After discussing internally, we
should start utilizing personal namespaces as much as possible.

cc @moul 

<details><summary>Contributors' checklist...</summary>

- [x] Added new tests, or not needed, or not feasible
- [x] Provided an example (e.g. screenshot) to aid review or the PR is
self-explanatory
- [x] Updated the official documentation or not needed
- [x] No breaking changes were made, or a `BREAKING CHANGE: xxx` message
was included in the description
- [x] Added references to related issues and PRs
- [x] Provided any useful hints for running manual tests
</details>

examples/gno.land/r/gnoland/home/gno.mod

@@ -4,7 +4,7 @@ require (
 	gno.land/p/demo/ownable v0.0.0-latest
 	gno.land/p/demo/ufmt v0.0.0-latest
 	gno.land/p/demo/ui v0.0.0-latest
-	gno.land/r/demo/hof v0.0.0-latest
 	gno.land/r/gnoland/blog v0.0.0-latest
 	gno.land/r/gnoland/events v0.0.0-latest
+	gno.land/r/leon/hof v0.0.0-latest
 )

examples/gno.land/r/gnoland/home/home.gno

@@ -6,9 +6,9 @@ import (
 	"gno.land/p/demo/ownable"
 	"gno.land/p/demo/ufmt"
 	"gno.land/p/demo/ui"
-	"gno.land/r/demo/hof"
 	blog "gno.land/r/gnoland/blog"
 	events "gno.land/r/gnoland/events"
+	"gno.land/r/leon/hof"
 )
 
 // XXX: p/demo/ui API is crappy, we need to make it more idiomatic

examples/gno.land/r/demo/hof/gno.mod → examples/gno.land/r/leon/hof/gno.mod

@@ -1,4 +1,4 @@
-module gno.land/r/demo/hof
+module gno.land/r/leon/hof
 
 require (
 	gno.land/p/demo/avl v0.0.0-latest

examples/gno.land/r/leon/home/gno.mod

@@ -4,7 +4,7 @@ require (
 	gno.land/p/demo/ufmt v0.0.0-latest
 	gno.land/r/demo/art/gnoface v0.0.0-latest
 	gno.land/r/demo/art/millipede v0.0.0-latest
-	gno.land/r/demo/hof v0.0.0-latest
 	gno.land/r/demo/mirror v0.0.0-latest
 	gno.land/r/leon/config v0.0.0-latest
+	gno.land/r/leon/hof v0.0.0-latest
 )

examples/gno.land/r/leon/home/home.gno

@@ -8,9 +8,9 @@ import (
 
 	"gno.land/r/demo/art/gnoface"
 	"gno.land/r/demo/art/millipede"
-	"gno.land/r/demo/hof"
 	"gno.land/r/demo/mirror"
 	"gno.land/r/leon/config"
+	"gno.land/r/leon/hof"
 )
 
 var (

examples/gno.land/r/manfred/home/gno.mod

@@ -1,6 +1,6 @@
 module gno.land/r/manfred/home
 
 require (
-	gno.land/r/demo/hof v0.0.0-latest
+	gno.land/r/leon/hof v0.0.0-latest
 	gno.land/r/manfred/config v0.0.0-latest
 )

examples/gno.land/r/manfred/home/home.gno

@@ -1,7 +1,7 @@
 package home
 
 import (
-	"gno.land/r/demo/hof"
+	"gno.land/r/leon/hof"
 	"gno.land/r/manfred/config"
 )
 

examples/gno.land/r/morgan/home/gno.mod

@@ -1,3 +1,3 @@
 module gno.land/r/morgan/home
 
-require gno.land/r/demo/hof v0.0.0-latest
+require gno.land/r/leon/hof v0.0.0-latest

examples/gno.land/r/morgan/home/home.gno

@@ -1,6 +1,6 @@
 package home
 
-import "gno.land/r/demo/hof"
+import "gno.land/r/leon/hof"
 
 const staticHome = `# morgan's (gn)home