feat(aspen/emacs): Begin a complete emacs config revamp

I'm still on doom, but without all the cruft I've accumulated over the
last ~6 years it's actually good and fast and nice. Also, the config is
literate now!

The old emacs is still in .emacs.d, since occasionally I want to
reference it, but eventually I'll just get rid of it

Change-Id: Icda840d798594f7e6b188dba044494597d5f6043
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10999
Reviewed-by: aspen <root@gws.fyi>
Tested-by: BuildkiteCI

users/aspen/emacs/snippets/rust-mode/#[macro_use]

@@ -0,0 +1,5 @@
+# key: macro_use
+# name: #[macro_use]
+# --
+#[macro_use]
+${1:extern crate} ${2:something};$0

users/aspen/emacs/snippets/rust-mode/async test

@@ -0,0 +1,10 @@
+# -*- mode: snippet -*-
+# name: async test
+# uuid: atest
+# key: atest
+# condition: t
+# --
+#[tokio::test${1:(flavor = "multi_thread")}]
+async fn ${2:test_name}() {
+   `%`$0
+}

users/aspen/emacs/snippets/rust-mode/benchmark

@@ -0,0 +1,10 @@
+# -*- mode: snippet -*-
+# name: benchmark
+# uuid: benchmark
+# key: bench
+# condition: t
+# --
+#[bench]
+fn ${1:benchmark_name}(b: &mut Bencher) {
+   `%`b.iter(|| $0);
+}

users/aspen/emacs/snippets/rust-mode/proptest

@@ -0,0 +1,10 @@
+# -*- mode: snippet -*-
+# name: proptest
+# uuid: proptest
+# key: proptest
+# condition: t
+# --
+#[proptest]
+fn ${1:test_name}($2) {
+   `%`$0
+}

users/aspen/emacs/snippets/rust-mode/test-module

@@ -0,0 +1,11 @@
+# -*- mode: snippet -*-
+# name: test-module
+# uuid: test-module
+# key: tmod
+# condition: t
+# --
+mod $1 {
+    use super::*;
+
+    $0
+}

users/aspen/emacs/snippets/rust-mode/tests

@@ -0,0 +1,9 @@
+# key: tests
+# name: test module
+# --
+#[cfg(test)]
+mod ${1:tests} {
+    use super::*;
+
+    $0
+}