Use \ket and \bra macros instead of \rangle and \langle

[tcNickolas]

Closes #1448.

• Mostly automatically generated, had to fix a few formulas manually (one had a missing bracket before | which is now a parsing issue)
• The remaining \rangle and \langle are in linear algebra and qubit topics, where they denote inner product rather than bra-ket notation.

[github-actions[bot]]

Benchmark for 2cfcca3

Click to view benchmark

Test	Base	PR	%
Array append evaluation	343.7±2.50µs	341.5±2.24µs	-0.64%
Array literal evaluation	197.9±0.38µs	179.4±1.56µs	-9.35%
Array update evaluation	426.0±3.01µs	421.9±2.23µs	-0.96%
Core + Standard library compilation	17.2±0.34ms	17.0±0.20ms	-1.16%
Deutsch-Jozsa evaluation	5.0±0.05ms	5.0±0.18ms	0.00%
Large file parity evaluation	33.6±0.11ms	33.7±0.30ms	+0.30%
Large input file compilation	11.7±0.17ms	11.5±0.17ms	-1.71%
Large input file compilation (interpreter)	45.7±1.15ms	45.9±1.23ms	+0.44%
Large nested iteration	33.9±0.16ms	33.3±0.31ms	-1.77%
Perform Runtime Capabilities Analysis (RCA) on Deutsch-Jozsa sample	1545.8±40.96µs	1543.6±31.57µs	-0.14%
Perform Runtime Capabilities Analysis (RCA) on large file sample	7.7±0.17ms	7.7±0.18ms	0.00%
Perform Runtime Capabilities Analysis (RCA) on teleport sample	1409.5±35.45µs	1414.6±42.56µs	+0.36%
Perform Runtime Capabilities Analysis (RCA) on the core and std libraries	27.5±0.20ms	27.2±0.29ms	-1.09%
Teleport evaluation	87.1±4.08µs	88.2±4.14µs	+1.26%

[billti]

I can't believe I just looked through every line of that (I didn't realize how big it was when I started 🤣 ). I also spot checked the rendering of some of the trickier changes locally. Great job! I'm sure you automated most of the changes, but there was still some really subtle syntax updates, and I didn't catch a single issue.

I do think the LaTeX is much easier to follow with these commands. Thanks!