Update Octicons to v10 (#12240)

* Update Octicons to v10

Besides a few renames, these icons are no longer present in v10 that we've
used, so had to change:

file-symlink-directory -> file-submodule
internal-repo -> repo
repo-force-push -> repo-push
repo-template-private -> repo-template

Fixes: https://github.com/go-gitea/gitea/issues/11889
Ref: https://github.com/primer/octicons/releases/tag/v10.0.0

* add custom sliders svg for removed octicon-settings

* apply suggestion

* fix triangles and use play on admin dashboard

* add custom mirror svg

* add missing build files

* unify custom svgs

* move to octicon-repo-clone to gitea-mirror

* use octicon-x on conflicts

* tweak timeline icons

* tweak comment buttons

* update settings icon to octicons v1

* switch to octicon-mirror and octicon-tools

* replace two wiki buttons with octicons

* remove whitespace in svg sources

* Fix filepath basename on Windows for SVG bindata (#12241)

* move octicons to devDependencies

* move back to dependencies

* move svgo to devDependencies again

Co-authored-by: Cirno the Strongest <1447794+CirnoT@users.noreply.github.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

templates/base/head_navbar.tmpl

@@ -90,7 +90,7 @@
 						<span class="fitted">{{svg "octicon-plus" 16}}</span> {{.i18n.Tr "new_repo"}}
 					</a>
 					<a class="item" href="{{AppSubUrl}}/repo/migrate">
-						<span class="fitted">{{svg "octicon-repo-clone" 16}}</span> {{.i18n.Tr "new_migrate"}}
+						<span class="fitted">{{svg "octicon-repo-push" 16}}</span> {{.i18n.Tr "new_migrate"}}
 					</a>
 					{{if .SignedUser.CanCreateOrganization}}
 					<a class="item" href="{{AppSubUrl}}/org/create">
@@ -122,7 +122,7 @@
 						{{.i18n.Tr "your_starred"}}
 					</a>
 					<a class="{{if .PageIsUserSettings}}active{{end}} item" href="{{AppSubUrl}}/user/settings">
-						{{svg "octicon-settings" 16}}
+						{{svg "octicon-tools" 16}}
 						{{.i18n.Tr "your_settings"}}<!-- Your settings -->
 					</a>
 					<a class="item" target="_blank" rel="noopener noreferrer" href="https://docs.gitea.io">