add Atom config files from kanaya

.atom/config.cson

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+"*":
+  "bracket-matcher": {}
+  core:
+    audioBeep: false
+    telemetryConsent: "limited"
+    useTreeSitterParsers: false
+  editor:
+    lineHeight: 1.25
+    preferredLineLength: 120
+    scrollPastEnd: true
+    tabLength: 4
+  "exception-reporting":
+    userId: "4af648ae-236c-4a18-be73-72a7b1981edc"
+  "git-diff": {}
+  tabs:
+    enableMruTabSwitching: false
+  welcome:
+    showOnStartup: false

.atom/keymap.cson

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+# Disable Enter key for confirming an autocomplete suggestion
+#'atom-text-editor:not(mini).autocomplete-active':
+#  'enter': 'editor:newline'
+
+# 'body':
+#     'ctrl-tab': 'pane:show-next-item'
+#     'ctrl-tab ^ctrl': 'unset!'
+#     'ctrl-shift-tab': 'pane:show-previous-item'
+#     'ctrl-shift-tab ^ctrl': 'unset!'
+
+'atom-text-editor':
+  'shift-enter': 'editor:move-to-end-of-screen-line'
+  # vim-like cursor movement with alt-[hjkl]
+  'alt-h': 'core:move-left'
+  'alt-j': 'core:move-down'
+  'alt-k': 'core:move-up'
+  'alt-l': 'core:move-right'
+  # jump to previous/next linter error
+  'ctrl-<': 'linter-ui-default:previous'
+  'ctrl->': 'linter-ui-default:next'

.atom/styles.less

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+// Line-highlighting for ToDo tags
+
+// TODO example
+// FIXME example
+// XXX example
+// NOTE example
+
+.syntax--todo,
+.syntax--fixme,
+.syntax--xxx,
+.syntax--note {
+    display: inline-block;
+    position: relative;
+    color: rgba(0, 255, 0, 0.8);
+    background: rgba(0, 255, 0, 0.08);
+    font-weight: bold;
+
+    &:before, &:after {
+        display: block;
+        position: absolute;
+        top: 0;
+        height: 100%;
+        width: 8192px;
+        // z-index: 9999;
+        content: '';
+        background: inherit;
+        pointer-events: none;
+    }
+    &:before {
+        right: 100%;
+    }
+    &:after {
+        left: 100%;
+    }
+}
+
+.syntax--fixme,
+.syntax--xxx {
+    color: rgba(255, 0, 0, 1);
+    background: rgba(255, 0, 0, 0.1);
+}
+
+.syntax--note {
+    color: rgba(80, 80, 255, 1);
+    background: rgba(0, 0, 255, 0.1);
+}