Merge #1687 #1725

1687: Extract remaining citations r=charleskawczynski a=charleskawczynski

### Description

Extracts remaining references/citations to `docs/bibliography.bib`.



1725: Move first order moisture flux to new tendency specification r=charleskawczynski a=charleskawczynski

### Description

This PR

 - moves the first order moisture flux to the new tendency specification. I can confirm that the tendency table is updated, for `experiments/AtmosLES/bomex_model.jl` with `moisture_model == "nonequilibrium"`, but I haven't checked the results.
 - Renames `flux_moisture!` to `flux_first_order!` in efforts to standardize some of the AtmosModel method calls
 - Adds `Moisture <: PrognosticVariable` to combine specification for the moisture variables.




Co-authored-by: Charles Kawczynski <kawczynski.charles@gmail.com>

.buildkite/pipeline.yml

@@ -1079,6 +1079,16 @@ steps:
       slurm_ntasks: 1
       slurm_gres: "gpu:1"
 
+  - label: "gpu_bomex_single_stack_nonequil"
+    key: "gpu_bomex_single_stack_nonequil"
+    command:
+      - "mpiexec julia --color=yes --project experiments/AtmosLES/bomex_single_stack.jl --moisture-model=nonequilibrium --diagnostics=default --fix-rng-seed"
+    agents:
+      config: gpu
+      queue: central
+      slurm_ntasks: 1
+      slurm_gres: "gpu:1"
+
   - label: "gpu_bomex_edmf"
     key: "gpu_bomex_edmf"
     command: