Update JS dependencies and misc tweaks (#25540)

- Update all JS dependencies
- Enable `declaration-property-unit-disallowed-list` to forbid `em` on
`line-height`
- Rename dependency update targets to `update-js` and `update-py` and
document them
- Remove margin on Asciicast viewer
- Tested Swagger, Katex, Asciicast

<img width="1243" alt="Screenshot 2023-06-27 at 19 51 05"
src="2d2722a0-2aa7-4f4c-b8bd-17e1f3637b78">

web_src/css/base.css

@@ -2166,7 +2166,7 @@ table th[data-sortt-desc] .svg {
 }
 
 .truncated-item-name {
-  line-height: 2em;
+  line-height: 2;
   white-space: nowrap;
   overflow: hidden;
   text-overflow: ellipsis;
@@ -2188,7 +2188,7 @@ table th[data-sortt-desc] .svg {
 }
 
 .ui.dropdown {
-  line-height: 1em; /* the dropdown doesn't have default line-height, use this to make the dropdown icon align with plain dropdown */
+  line-height: 1; /* the dropdown doesn't have default line-height, use this to make the dropdown icon align with plain dropdown */
 }
 
 /* dropdown has some kinds of icons:

web_src/css/modules/card.css

@@ -59,7 +59,7 @@
   font-weight: var(--font-weight-medium);
   font-size: 1.28571429em;
   margin-top: -.21425em;
-  line-height: 1.28571429em;
+  line-height: 1.28571429;
 }
 
 .ui.cards > .card > .content:first-child,

web_src/css/repo.css

@@ -478,7 +478,7 @@
 }
 
 .repository.file.list .non-diff-file-content .asciicast {
-  padding: 5px !important;
+  padding: 0 !important;
 }
 
 .non-diff-file-content .attached.segment,
@@ -1903,7 +1903,7 @@
 
 .repository.settings.collaboration .collaborator.list > .item {
   margin: 0;
-  line-height: 2em;
+  line-height: 2;
 }
 
 .repository.settings.collaboration #repo-collab-form #search-user-box .results {
@@ -2601,7 +2601,7 @@
 .labels-list .label {
   margin: 2px 0;
   display: inline-flex !important;
-  line-height: 1.3em; /* there is a `font-size: 1.25em` for inside emoji, so here the line-height needs to be larger slightly */
+  line-height: 1.3; /* there is a `font-size: 1.25em` for inside emoji, so here the line-height needs to be larger slightly */
 }
 
 /* Scoped labels with different colors on left and right */