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-bookmark.svg

@@ -1 +1 @@
-<svg viewBox="0 0 10 16" class="svg octicon-bookmark" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M9 0H1C.27 0 0 .27 0 1v15l5-3.09L10 16V1c0-.73-.27-1-1-1zm-.78 4.25L6.36 5.61l.72 2.16c.06.22-.02.28-.2.17L5 6.6 3.12 7.94c-.19.11-.25.05-.2-.17l.72-2.16-1.86-1.36c-.17-.16-.14-.23.09-.23l2.3-.03.7-2.16h.25l.7 2.16 2.3.03c.23 0 .27.08.09.23h.01z"/></svg>
+<svg viewBox="0 0 16 16" class="svg octicon-bookmark" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M4.75 2.5a.25.25 0 00-.25.25v9.91l3.023-2.489a.75.75 0 01.954 0l3.023 2.49V2.75a.25.25 0 00-.25-.25h-6.5zM3 2.75C3 1.784 3.784 1 4.75 1h6.5c.966 0 1.75.784 1.75 1.75v11.5a.75.75 0 01-1.227.579L8 11.722l-3.773 3.107A.75.75 0 013 14.25V2.75z"/></svg>