chore: move template context (#8663)

The template module now holds the **Template** context, this makes it possible for (render) function in the template module to access functions and share data between render functions.

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/8663
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Reviewed-by: Lucas <sclu1034@noreply.codeberg.org>
Co-authored-by: Gusted <postmaster@gusted.xyz>
Co-committed-by: Gusted <postmaster@gusted.xyz>

modules/templates/context.go

@@ -0,0 +1,23 @@
+// Copyright 2025 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package templates
+
+import (
+	"context"
+
+	"forgejo.org/modules/translation"
+)
+
+type Context struct {
+	context.Context
+	Locale      translation.Locale
+	AvatarUtils *AvatarUtils
+	Data        map[string]any
+}
+
+var _ context.Context = Context{}
+
+func NewContext(ctx context.Context) *Context {
+	return &Context{Context: ctx}
+}