Improve Assembly icon

[what]
Adds consistance with other low level languages icons like C/C++.

Reverted the change on `asm.svg`, added `asm_nf.svg`, modified `icons.tsv`

[note]
Closes https://github.com/ryanoasis/nerd-fonts/issues/857.
Closes [990#pullrequestreview-1171459043](https://github.com/ryanoasis/nerd-fonts/pull/990#pullrequestreview-1171459043)

Signed-off-by: igna_martinoli <ignamartinoli@protonmail.com>

[Note by Fini: Squashed two commits.]

Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>

src/svgs/asm_nf.svg

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   version="1.1"
+   id="svg2282"
+   width="800"
+   height="800"
+   viewBox="0 0 800 800"
+   sodipodi:docname="asm.svg"
+   inkscape:version="1.2.1 (9c6d41e410, 2022-07-14)"
+   inkscape:export-filename="asm.png"
+   inkscape:export-xdpi="96"
+   inkscape:export-ydpi="96"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs2286" />
+  <sodipodi:namedview
+     id="namedview2284"
+     pagecolor="#505050"
+     bordercolor="#eeeeee"
+     borderopacity="1"
+     inkscape:showpageshadow="0"
+     inkscape:pageopacity="0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#505050"
+     showgrid="false"
+     inkscape:zoom="1.125"
+     inkscape:cx="321.33333"
+     inkscape:cy="401.33333"
+     inkscape:window-width="1920"
+     inkscape:window-height="1055"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="g2288" />
+  <g
+     inkscape:groupmode="layer"
+     inkscape:label="Image"
+     id="g2288">
+    <path
+       style="fill:#000000;stroke-width:1.33333"
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+       id="path2409" />
+  </g>
+</svg>

src/svgs/icons.tsv

@@ -84,6 +84,7 @@
 056		i_custom_emacs				emacs_nf.svg
 057		i_custom_orgmode			orgmode_nf.svg
 058		i_custom_kotlin				kotlin_nf.svg
+59		i_custom_asm				asm_nf.svg
 058		i_seti_kotlin
 059		i_seti_apple				apple.svg
 060		i_seti_argdown				argdown.svg