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-heart-fill.svg

@@ -0,0 +1 @@
+<svg viewBox="0 0 16 16" class="svg octicon-heart-fill" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.655 14.916L8 14.25l.345.666a.752.752 0 01-.69 0zm0 0L8 14.25l.345.666.002-.001.006-.003.018-.01a7.643 7.643 0 00.31-.17 22.08 22.08 0 003.433-2.414C13.956 10.731 16 8.35 16 5.5 16 2.836 13.914 1 11.75 1 10.203 1 8.847 1.802 8 3.02 7.153 1.802 5.797 1 4.25 1 2.086 1 0 2.836 0 5.5c0 2.85 2.045 5.231 3.885 6.818a22.075 22.075 0 003.744 2.584l.018.01.006.003h.002z"/></svg>