Solid waste edits

[zeyandell]

These small edits add citations and a ctu methods section to the solid waste quarto documents.

Checklist

Please complete this checklist as a courtesy to the PR reviewer.

Code and styling

• All of the files/scripts I added are in the right place and named appropriately. See the README for details.
• I have not used setwd()
• I have used file.path(here::here(), "file_name")) to source any scripts or read in data
• I have not added any large datasets, unless absolutely necessary (explain)
• I have commented my code, particularly in hard to understand areas
• I have added additional package dependencies as necessary with renv::install()
• I have run styler::style_dir(".", recursive = TRUE, filetype = c("R", "qmd"))
• Plots
  • If plotly, use source = "chunk-name" in plot_ly()
  • Use formatting with councilR::plotly_layout()?
• Chunk formatting
  • All chunks named
  • All figure or table chunks have caption
  • out.width: "95%". If a specific height is needed, use pixels. and/or out.height: "500px"

Document editing

• I have ensured that modified documents knit successfully from render_for_publication.R
• I have fixed any missing citations, cross references, hyperlinks
• I have reviewed my contributions for typos and misspellings.

GitHub and project management

• I have identified and assigned at least one Reviewer (Liz, Sam, Laine) to this PR
• I have assigned myself to this PR
• I have updated the status in the GitHub Project

[pawilfahrt]

Thanks for the refreshingly straightforward PR!