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>

public/img/svg/octicon-skip.svg

@@ -1 +1 @@
-<svg viewBox="0 0 16 16" class="svg octicon-skip" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M5.79 11.624l-1.326-.088-.088-1.326 5.834-5.834 1.326.088.088 1.326-5.834 5.834zM8 15A7 7 0 108 1a7 7 0 000 14zm5.5-7a5.5 5.5 0 11-11 0 5.5 5.5 0 0111 0z"/></svg>
+<svg viewBox="0 0 16 16" class="svg octicon-skip" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M1.5 8a6.5 6.5 0 1113 0 6.5 6.5 0 01-13 0zM8 0a8 8 0 100 16A8 8 0 008 0zm3.28 5.78a.75.75 0 00-1.06-1.06l-5.5 5.5a.75.75 0 101.06 1.06l5.5-5.5z"/></svg>